The HSQLDB Server.java source code
/* Copyright (c) 2001-2008, The HSQL Development Group
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the HSQL Development Group nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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package org.hsqldb;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.UnknownHostException;
import java.util.Enumeration;
import java.util.StringTokenizer;
import org.hsqldb.lib.ArrayUtil;
import org.hsqldb.lib.FileUtil;
import org.hsqldb.lib.HashSet;
import org.hsqldb.lib.Iterator;
import org.hsqldb.lib.StopWatch;
import org.hsqldb.lib.StringUtil;
import org.hsqldb.lib.WrapperIterator;
import org.hsqldb.lib.java.JavaSystem;
import org.hsqldb.persist.HsqlDatabaseProperties;
import org.hsqldb.persist.HsqlProperties;
import org.hsqldb.resources.BundleHandler;
// fredt@users 20020215 - patch 1.7.0
// methods reorganised to use new HsqlProperties class
// fredt@users 20020424 - patch 1.7.0 - shutdown without exit
// see the comments in ServerConnection.java
// unsaved@users 20021113 - patch 1.7.2 - SSL support
// boucherb@users 20030510-14 - 1.7.2 - SSL support moved to factory interface
// boucherb@users 20030510-14 - 1.7.2 - service control, JavaBean API
// fredt@users 20030916 - 1.7.2 - review, simplification and multiple DB's
// fredt@users 20040320 - 1.7.2 - review and correction
// fredt@users 20050225 - 1.8.0 - minor corrections
// fredt@users 20051231 - 1.8.1 - support for remote opening of databases
// fredt@users 20080531 - 1.8.1 - removed synchronized from print methods
// unnecessary and could cause deadlock
/**
* The HSQLDB HSQL protocol network database server. <p>
*
* A Server object acts as a network database server and is one way of using
* the client-server mode of HSQLDB Database Engine. Instances of this
* class handle native HSQL protocol connections exclusively, allowing database
* queries to be performed efficienly across the network. Server's direct
* descendent, WebServer, handles HTTP protocol connections exclusively,
* allowing HSQL protocol to be tunneled over HTTP to avoid sandbox and
* firewall issues, albeit less efficiently. <p>
*
* There are a number of ways to configure and start a Server instance. <p>
*
* When started from the command line or programatically via the main(String[])
* method, configuration occurs in three phases, with later phases overriding
* properties set by previous phases:
*
* <ol>
* <li>Upon construction, a Server object is assigned a set of default
* properties. <p>
*
* <li>If it exists, properties are loaded from a file named
* 'server.properties' in the present working directory. <p>
*
* <li>The command line arguments (alternatively, the String[] passed to
* main()) are parsed and used to further configure the Server's
* properties. <p>
*
* </ol>
*
* From the command line, the options are as follows: <p>
* <pre>
* +----------------+-------------+----------+------------------------------+
* | OPTION | TYPE | DEFAULT | DESCRIPTION |
* +----------------+-------------+----------+------------------------------|
* | -? | -- | -- | prints this message |
* | -address | name|number | any | server inet address |
* | -port | number | 9001/544 | port at which server listens |
* | -database.i | [type]spec | 0=test | path of database i |
* | -dbname.i | alias | -- | url alias for database i |
* | -silent | true|false | true | false => display all queries |
* | -trace | true|false | false | display JDBC trace messages |
* | -tls | true|false | false | TLS/SSL (secure) sockets |
* | -no_system_exit| true|false | false | do not issue System.exit() |
* | -remote_open | true|false | false | can open databases remotely |
* +----------------+-------------+----------+------------------------------+
* </pre>
*
* The <em>database.i and dbname.i options need further
* explanation:
*
* <ul>
* <li>Multiple databases can be served by each instance of the Server.
* The value of <em>i is currently limited to the range 0..9,
* allowing up to 10 different databases. Any number is this range
* can be used.<p>
*
* <li>The value assigned to database.i is interpreted using the
* format <b>'[type]spec', where the optional type component
* is one of <b>'file:', 'res:' or 'mem:' and the
* <em>spec component is interpreted in the context of the
* <em>type component.
*
* If omitted, the <em>type component is taken to be
* <b>'file:'.
*
* A full description of how
* <b>'[type]spec' values are interpreted appears in the overview for
* {@link org.hsqldb.jdbc.jdbcConnection jdbcConnection}. <p>
*
* <li>The value assigned to dbname.i is taken to be the key used to
* look up the desired database instance and thus corresponds to the
* <b><alias> component of the HSQLDB HSQL protocol database
* connection url:
* 'jdbc:hsqldb:hsql[s]://host[port][/<b><alias>]'.
*
* <li>The value of database.0 is special. If dbname.0
* is not specified, then this defaults to an empty string and
* a connection is made to <em>database.0 path when
* the <b><alias> component of an HSQLDB HSQL protocol database
* connection url is omitted. If a <em>database key/value pair is
* found in the properties when the main method is called, this
* pair is supersedes the <em>database.0 setting
*
* This behaviour allows the previous
* database connection url format to work with essentially unchanged
* semantics.<p>
*
* <li>When the remote_open property is true, a connection attempt
* to an unopened database results in the database being opened. The URL
* for connection should include the property filepath to specify the path.
* 'jdbc:hsqldb:hsql[s]://host[port]/<b><alias>;filepath=hsqldb:file:<database path>'.
* the given alias and filepath value will be associated together. The
* database user and password to start this connection must be valid.
* If this form of connection is used again, after the database has been
* opened, the filepath property is ignored.<p>
*
* <li>Once an alias such as "mydb" has been associated with a path, it cannot
* be reassigned to a different path.<p>
*
* <li>If a database is closed with the SHUTDOWN command, its
* alias is removed. It is then possible to connect to this database again
* with a different (or the same) alias.<p>
*
* <li>If the same database is connected to via two different
* aliases, and then one of the is closed with the SHUTDOWN command, the
* other is also closed.<p>
* </ul>
*
* From the 'server.properties' file, options can be set similarly, using a
* slightly different format. <p>
*
* Here is an example 'server.properties' file:
*
* <pre>
* server.port=9001
* server.database.0=test
* server.dbname.0=...
* ...
* server.database.n=...
* server.dbname.n=...
* server.silent=true
* </pre>
*
* Starting with 1.7.2, Server has been refactored to become a simple JavaBean
* with non-blocking start() and stop() service methods. It is possible to
* configure a Server instance through the JavaBean API as well, but this
* part of the public interface is still under review and will not be finalized
* or documented fully until the final 1.7.2 release. <p>
*
* <b>Note:
*
* The 'no_system_exit' property is of particular interest. <p>
*
* If a Server instance is to run embedded in, say, an application server,
* such as when the jdbcDataSource or HsqlServerFactory classes are used, it
* is typically necessary to avoid calling System.exit() when the Server
* instance shuts down. <p>
*
* By default, 'no_system_exit' is set: <p>
*
* <ol>
* <li>true when a Server is started directly from the start()
* method. <p>
*
* <li>false when a Server is started from the main(String[])
* method.
* </ol>
*
* These values are natural to their context because the first case allows
* the JVM to exit by default on Server shutdown when a Server instance is
* started from a command line environment, whereas the second case prevents
* a typically unwanted JVM exit on Server shutdown when a Server intance
* is started as part of a larger framework. <p>
*
* Replaces original Hypersonic source of the same name.
*
* @author fredt@users
* @version 1.8.0
* @since 1.7.2
*
* @jmx.mbean
* description="HSQLDB Server"
* extends="org.hsqldb.mx.mbean.RegistrationSupportBaseMBean"
*
* @jboss.xmbean
*/
public class Server implements HsqlSocketRequestHandler {
//
protected static final int serverBundleHandle =
BundleHandler.getBundleHandle("org_hsqldb_Server_messages", null);
//
HsqlProperties serverProperties;
//
HashSet serverConnSet;
//
private String[] dbAlias;
private String[] dbType;
private String[] dbPath;
private HsqlProperties[] dbProps;
private int[] dbID;
// Currently unused
private int maxConnections;
//
protected String serverId;
protected int serverProtocol;
protected ThreadGroup serverConnectionThreadGroup;
protected HsqlSocketFactory socketFactory;
protected ServerSocket socket;
//
private Thread serverThread;
private Throwable serverError;
private volatile int serverState;
private volatile boolean isSilent;
private volatile boolean isRemoteOpen;
private PrintWriter logWriter;
private PrintWriter errWriter;
//
/**
* A specialized Thread inner class in which the run() method of this
* server executes.
*/
private class ServerThread extends Thread {
/**
* Constructs a new thread in which to execute the run method
* of this server.
*
* @param name The thread name
*/
ServerThread(String name) {
super(name);
setName(name + '@' + Integer.toString(Server.this.hashCode(), 16));
}
/**
* Executes the run() method of this server
*/
public void run() {
Server.this.run();
printWithThread("ServerThread.run() exited");
}
}
/**
* Creates a new Server instance handling HSQL protocol connections.
*/
public Server() {
this(ServerConstants.SC_PROTOCOL_HSQL);
}
/**
* Creates a new Server instance handling the specified connection
* protocol. <p>
*
* For example, the no-args WebServer constructor invokes this constructor
* with ServerConstants.SC_PROTOCOL_HTTP, while the Server() no args
* contructor invokes this constructor with
* ServerConstants.SC_PROTOCOL_HSQL. <p>
*
* @param protocol the ServerConstants code indicating which
* connection protocol to handle
*/
protected Server(int protocol) {
init(protocol);
}
/**
* Creates and starts a new Server. <p>
*
* Allows starting a Server via the command line interface. <p>
*
* @param args the command line arguments for the Server instance
*/
public static void main(String[] args) {
String propsPath =
FileUtil.getDefaultInstance().canonicalOrAbsolutePath("server");
HsqlProperties fileProps =
ServerConfiguration.getPropertiesFromFile(propsPath);
HsqlProperties props = fileProps == null ? new HsqlProperties()
: fileProps;
HsqlProperties stringProps = null;
try {
stringProps = HsqlProperties.argArrayToProps(args,
ServerConstants.SC_KEY_PREFIX);
} catch (ArrayIndexOutOfBoundsException aioob) {
// I'd like to exit with 0 here, but it's possible that user
// has called main() programmatically and does not want us to
// exit.
printHelp("server.help");
return;
}
if (stringProps != null) {
if (stringProps.getErrorKeys().length != 0) {
printHelp("server.help");
return;
}
props.addProperties(stringProps);
}
ServerConfiguration.translateDefaultDatabaseProperty(props);
// Standard behaviour when started from the command line
// is to halt the VM when the server shuts down. This may, of
// course, be overridden by whatever, if any, security policy
// is in place.
ServerConfiguration.translateDefaultNoSystemExitProperty(props);
// finished setting up properties;
Server server = new Server();
try {
server.setProperties(props);
} catch (Exception e) {
server.printError("Failed to set properties");
server.printStackTrace(e);
return;
}
// now messages go to the channel specified in properties
server.print("Startup sequence initiated from main() method");
if (fileProps != null) {
server.print("Loaded properties from [" + propsPath
+ ".properties]");
} else {
server.print("Could not load properties from file");
server.print("Using cli/default properties only");
}
server.start();
}
/**
* Checks if this Server object is or is not running and throws if the
* current state does not match the specified value.
*
* @param running if true, ensure the server is running, else ensure the
* server is not running
* @throws RuntimeException if the supplied value does not match the
* current running status
*/
public void checkRunning(boolean running) throws RuntimeException {
int state;
boolean error;
printWithThread("checkRunning(" + running + ") entered");
state = getState();
error = (running && state != ServerConstants.SERVER_STATE_ONLINE)
|| (!running
&& state != ServerConstants.SERVER_STATE_SHUTDOWN);
if (error) {
String msg = "server is " + (running ? "not "
: "") + "running";
throw new RuntimeException(msg);
}
printWithThread("checkRunning(" + running + ") exited");
}
/**
* Closes all connections to this Server.
*
* @jmx.managed-operation
* impact="ACTION"
* description="Closes all open connections"
*/
public synchronized void signalCloseAllServerConnections() {
Iterator it;
printWithThread("signalCloseAllServerConnections() entered");
synchronized (serverConnSet) {
// snapshot
it = new WrapperIterator(serverConnSet.toArray(null));
}
for (; it.hasNext(); ) {
ServerConnection sc = (ServerConnection) it.next();
printWithThread("Closing " + sc);
// also removes all but one connection from serverConnSet
sc.signalClose();
}
printWithThread("signalCloseAllServerConnections() exited");
}
protected void finalize() throws Throwable {
if (serverThread != null) {
releaseServerSocket();
}
}
/**
* Retrieves, in string form, this server's host address.
*
* @return this server's host address
*
* @jmx.managed-attribute
* access="read-write"
* description="Host InetAddress"
*/
public String getAddress() {
return socket == null
? serverProperties.getProperty(ServerConstants.SC_KEY_ADDRESS)
: socket.getInetAddress().getHostAddress();
}
/**
* Retrieves the url alias (network name) of the i'th database
* that this Server hosts.
*
* @param index the index of the url alias upon which to report
* @param asconfigured if true, report the configured value, else
* the live value
* @return the url alias component of the i'th database
* that this Server hosts, or null if no such name exists.
*
* @jmx.managed-operation
* impact="INFO"
* description="url alias component of the i'th hosted Database"
*
* @jmx.managed-operation-parameter
* name="index"
* type="int"
* position="0"
* description="This Server's index for the hosted Database"
*
* @jmx.managed-operation-parameter
* name="asconfigured"
* type="boolean"
* position="1"
* description="if true, the configured value, else the live value"
*/
public String getDatabaseName(int index, boolean asconfigured) {
if (asconfigured) {
return serverProperties.getProperty(ServerConstants.SC_KEY_DBNAME
+ "." + index);
} else if (getState() == ServerConstants.SERVER_STATE_ONLINE) {
return (dbAlias == null || index < 0 || index >= dbAlias.length)
? null
: dbAlias[index];
} else {
return null;
}
}
/**
* Retrieves the HSQLDB path descriptor (uri) of the i'th
* Database that this Server hosts.
*
* @param index the index of the uri upon which to report
* @param asconfigured if true, report the configured value, else
* the live value
* @return the HSQLDB database path descriptor of the i'th database
* that this Server hosts, or null if no such path descriptor
* exists
*
* @jmx.managed-operation
* impact="INFO"
* description="For i'th hosted database"
*
* @jmx.managed-operation-parameter
* name="index"
* type="int"
* position="0"
* description="This Server's index for the hosted Database"
*
* @jmx.managed-operation-parameter
* name="asconfigured"
* type="boolean"
* position="1"
* description="if true, the configured value, else the live value"
*/
public String getDatabasePath(int index, boolean asconfigured) {
if (asconfigured) {
return serverProperties.getProperty(ServerConstants.SC_KEY_DATABASE
+ "." + index);
} else if (getState() == ServerConstants.SERVER_STATE_ONLINE) {
return (dbPath == null || index < 0 || index >= dbPath.length)
? null
: dbPath[index];
} else {
return null;
}
}
public String getDatabaseType(int index) {
return (dbType == null || index < 0 || index >= dbType.length) ? null
: dbType[index];
}
/**
* Retrieves the name of the web page served when no page is specified.
* This attribute is relevant only when server protocol is HTTP(S).
*
* @return the name of the web page served when no page is specified
*
* @jmx.managed-attribute
* access="read-write"
* description="Used when server protocol is HTTP(S)"
*/
public String getDefaultWebPage() {
return "[IGNORED]";
}
/**
* Retrieves a String object describing the command line and
* properties options for this Server.
*
* @return the command line and properties options help for this Server
*/
public String getHelpString() {
return BundleHandler.getString(serverBundleHandle, "server.help");
}
/**
* Retrieves the PrintWriter to which server errors are printed.
*
* @return the PrintWriter to which server errors are printed.
*/
public PrintWriter getErrWriter() {
return errWriter;
}
/**
* Retrieves the PrintWriter to which server messages are printed.
*
* @return the PrintWriter to which server messages are printed.
*/
public PrintWriter getLogWriter() {
return logWriter;
}
/**
* Retrieves this server's host port.
*
* @return this server's host port
*
* @jmx.managed-attribute
* access="read-write"
* description="At which ServerSocket listens for connections"
*/
public int getPort() {
return serverProperties.getIntegerProperty(ServerConstants.SC_KEY_PORT,
ServerConfiguration.getDefaultPort(serverProtocol, isTls()));
}
/**
* Retrieves this server's product name. <p>
*
* Typically, this will be something like: "HSQLDB xxx server".
*
* @return the product name of this server
*
* @jmx.managed-attribute
* access="read-only"
* description="Of Server"
*/
public String getProductName() {
return "HSQLDB server";
}
/**
* Retrieves the server's product version, as a String. <p>
*
* Typically, this will be something like: "1.x.x" or "2.x.x" and so on.
*
* @return the product version of the server
*
* @jmx.managed-attribute
* access="read-only"
* description="Of Server"
*/
public String getProductVersion() {
return HsqlDatabaseProperties.THIS_VERSION;
}
/**
* Retrieves a string respresentaion of the network protocol
* this server offers, typically one of 'HTTP', HTTPS', 'HSQL' or 'HSQLS'.
*
* @return string respresentation of this server's protocol
*
* @jmx.managed-attribute
* access="read-only"
* description="Used to handle connections"
*/
public String getProtocol() {
return isTls() ? "HSQLS"
: "HSQL";
}
/**
* Retrieves a Throwable indicating the last server error, if any. <p>
*
* @return a Throwable indicating the last server error
*
* @jmx.managed-attribute
* access="read-only"
* description="Indicating last exception state"
*/
public Throwable getServerError() {
return serverError;
}
/**
* Retrieves a String identifying this Server object.
*
* @return a String identifying this Server object
*
* @jmx.managed-attribute
* access="read-only"
* description="Identifying Server"
*/
public String getServerId() {
return serverId;
}
/**
* Retrieves current state of this server in numerically coded form. <p>
*
* Typically, this will be one of: <p>
*
* <ol>
* <li>ServerProperties.SERVER_STATE_ONLINE (1)
* <li>ServerProperties.SERVER_STATE_OPENING (4)
* <li>ServerProperties.SERVER_STATE_CLOSING (8)
* <li>ServerProperties.SERVER_STATE_SHUTDOWN (16)
* </ol>
*
* @return this server's state code.
*
* @jmx.managed-attribute
* access="read-only"
* description="1:ONLINE 4:OPENING 8:CLOSING, 16:SHUTDOWN"
*/
public int getState() {
return serverState;
}
/**
* Retrieves a character sequence describing this server's current state,
* including the message of the last exception, if there is one and it
* is still in context.
*
* @return this server's state represented as a character sequence.
*
* @jmx.managed-attribute
* access="read-only"
* description="State as string"
*/
public String getStateDescriptor() {
String state;
Throwable t = getServerError();
switch (serverState) {
case ServerConstants.SERVER_STATE_SHUTDOWN :
state = "SHUTDOWN";
break;
case ServerConstants.SERVER_STATE_OPENING :
state = "OPENING";
break;
case ServerConstants.SERVER_STATE_CLOSING :
state = "CLOSING";
break;
case ServerConstants.SERVER_STATE_ONLINE :
state = "ONLINE";
break;
default :
state = "UNKNOWN";
break;
}
return state;
}
/**
* Retrieves the root context (directory) from which web content
* is served. This property is relevant only when the server
* protocol is HTTP(S). Although unlikely, it may be that in the future
* other contexts, such as jar urls may be supported, so that pages can
* be served from the contents of a jar or from the JVM class path.
*
* @return the root context (directory) from which web content is served
*
* @jmx.managed-attribute
* access="read-write"
* description="Context (directory)"
*/
public String getWebRoot() {
return "[IGNORED]";
}
/**
* Assigns the specified socket to a new conection handler and
* starts the handler in a new Thread.
*
* @param s the socket to connect
*/
public void handleConnection(Socket s) {
Thread t;
Runnable r;
String ctn;
printWithThread("handleConnection(" + s + ") entered");
if (!allowConnection(s)) {
try {
s.close();
} catch (Exception e) {}
printWithThread("allowConnection(): connection refused");
printWithThread("handleConnection() exited");
return;
}
// Maybe set up socket options, SSL
// Session tracing/callbacks, etc.
if (socketFactory != null) {
socketFactory.configureSocket(s);
}
if (serverProtocol == ServerConstants.SC_PROTOCOL_HSQL) {
r = new ServerConnection(s, this);
ctn = ((ServerConnection) r).getConnectionThreadName();
synchronized (serverConnSet) {
serverConnSet.add(r);
}
} else {
r = new WebServerConnection(s, (WebServer) this);
ctn = ((WebServerConnection) r).getConnectionThreadName();
}
t = new Thread(serverConnectionThreadGroup, r, ctn);
t.start();
printWithThread("handleConnection() exited");
}
/**
* Retrieves whether this server calls System.exit() when shutdown.
*
* @return true if this server does not call System.exit()
*
* @jmx.managed-attribute
* access="read-write"
* description="When Shutdown"
*/
public boolean isNoSystemExit() {
return serverProperties.isPropertyTrue(
ServerConstants.SC_KEY_NO_SYSTEM_EXIT);
}
/**
* Retrieves whether this server restarts on shutdown.
*
* @return true this server restarts on shutdown
*
* @jmx.managed-attribute
* access="read-write"
* description="Automatically?"
*/
public boolean isRestartOnShutdown() {
return serverProperties.isPropertyTrue(
ServerConstants.SC_KEY_AUTORESTART_SERVER);
}
/**
* Retrieves whether silent mode operation was requested in
* the server properties.
*
* @return if true, silent mode was requested, else trace messages
* are to be printed
*
* @jmx.managed-attribute
* access="read-write"
* description="No trace messages?"
*/
public boolean isSilent() {
return isSilent;
}
/**
* Retrieves whether the use of secure sockets was requested in the
* server properties.
*
* @return if true, secure sockets are requested, else not
*
* @jmx.managed-attribute
* access="read-write"
* description="Use TLS/SSL sockets?"
*/
public boolean isTls() {
return serverProperties.isPropertyTrue(ServerConstants.SC_KEY_TLS);
}
/**
* Retrieves whether JDBC trace messages are to go to System.out or the
* DriverManger PrintStream/PrintWriter, if any.
*
* @return true if tracing is on (JDBC trace messages to system out)
*
* @jmx.managed-attribute
* access="read-write"
* description="JDBC trace messages to System.out?"
*/
public boolean isTrace() {
return serverProperties.isPropertyTrue(ServerConstants.SC_KEY_TRACE);
}
/**
* Attempts to put properties from the file
* with the specified path. The file
* extension '.properties' is implicit and should not
* be included in the path specification.
*
* @param path the path of the desired properties file, without the
* '.properties' file extension
* @throws RuntimeException if this server is running
* @return true if the indicated file was read sucessfully, else false
*
* @jmx.managed-operation
* impact="ACTION"
* description="Reads in properties"
*
* @jmx.managed-operation-parameter
* name="path"
* type="java.lang.String"
* position="0"
* description="(optional) returns false if path is empty"
*/
public boolean putPropertiesFromFile(String path) {
if (getState() != ServerConstants.SERVER_STATE_SHUTDOWN) {
throw new RuntimeException();
}
path = FileUtil.getDefaultInstance().canonicalOrAbsolutePath(path);
HsqlProperties p = ServerConfiguration.getPropertiesFromFile(path);
if (p == null || p.isEmpty()) {
return false;
}
printWithThread("putPropertiesFromFile(): [" + path + ".properties]");
try {
setProperties(p);
} catch (Exception e) {
throw new RuntimeException("Failed to set properties: " + e);
}
return true;
}
/**
* Puts properties from the supplied string argument. The relevant
* key value pairs are the same as those for the (web)server.properties
* file format, except that the 'server.' prefix should not be specified.
*
* @param s semicolon-delimited key=value pair string,
* e.g. k1=v1;k2=v2;k3=v3...
* @throws RuntimeException if this server is running
*
* @jmx.managed-operation
* impact="ACTION"
* description="'server.' key prefix automatically supplied"
*
* @jmx.managed-operation-parameter
* name="s"
* type="java.lang.String"
* position="0"
* description="semicolon-delimited key=value pairs"
*/
public void putPropertiesFromString(String s) {
if (getState() != ServerConstants.SERVER_STATE_SHUTDOWN) {
throw new RuntimeException();
}
if (StringUtil.isEmpty(s)) {
return;
}
printWithThread("putPropertiesFromString(): [" + s + "]");
HsqlProperties p = HsqlProperties.delimitedArgPairsToProps(s, "=",
";", ServerConstants.SC_KEY_PREFIX);
try {
setProperties(p);
} catch (Exception e) {
throw new RuntimeException("Failed to set properties: " + e);
}
}
/**
* Sets the InetAddress with which this server's ServerSocket will be
* constructed. A null or empty string or the special value "0.0.0.0"
* can be used to bypass explicit selection, causing the ServerSocket
* to be constructed without specifying an InetAddress.
*
* @param address A string representing the desired InetAddress as would
* be retrieved by InetAddres.getByName(), or a null or empty string
* or "0.0.0.0" to signify that the server socket should be constructed
* using the signature that does not specify the InetAddress.
* @throws RuntimeException if this server is running
*
* @jmx.managed-attribute
*/
public void setAddress(String address) throws RuntimeException {
checkRunning(false);
if (org.hsqldb.lib.StringUtil.isEmpty(address)) {
address = ServerConstants.SC_DEFAULT_ADDRESS;
}
printWithThread("setAddress(" + address + ")");
serverProperties.setProperty(ServerConstants.SC_KEY_ADDRESS, address);
}
/**
* Sets the external name (url alias) of the i'th hosted database.
*
* @param name external name (url alias) of the i'th HSQLDB database
* instance this server is to host.
* @throws RuntimeException if this server is running
*
* @jmx.managed-operation
* impact="ACTION"
* description="Sets the url alias by which is known the i'th hosted Database"
*
* @jmx.managed-operation-parameter
* name="index"
* type="int"
* position="0"
* description="This Server's index for the hosted Database"
*
* @jmx.managed-operation-parameter
* name="name"
* type="java.lang.String"
* position="1"
* description="url alias component for the hosted Database"
*/
public void setDatabaseName(int index,
String name) throws RuntimeException {
checkRunning(false);
printWithThread("setDatabaseName(" + index + "," + name + ")");
serverProperties.setProperty(ServerConstants.SC_KEY_DBNAME + "."
+ index, name);
}
/**
* Sets the path of the hosted database.
*
* @param path The path of the i'th HSQLDB database instance this server
* is to host.
*
* @jmx.managed-operation
* impact="ACTION"
* description="Sets the database uri path for the i'th hosted Database"
*
* @jmx.managed-operation-parameter
* name="index"
* type="int"
* position="0"
* description="This Server's index for the hosted Database"
*
* @jmx.managed-operation-parameter
* name="path"
* type="java.lang.String"
* position="1"
* description="database uri path of the hosted Database"
*/
public void setDatabasePath(int index,
String path) throws RuntimeException {
checkRunning(false);
printWithThread("setDatabasePath(" + index + "," + path + ")");
serverProperties.setProperty(ServerConstants.SC_KEY_DATABASE + "."
+ index, path);
}
/**
* Sets the name of the web page served when no page is specified.
*
* @param file the name of the web page served when no page is specified
*
* @jmx.managed-attribute
*/
public void setDefaultWebPage(String file) {
checkRunning(false);
printWithThread("setDefaultWebPage(" + file + ")");
if (serverProtocol != ServerConstants.SC_PROTOCOL_HTTP) {
return;
}
serverProperties.setProperty(ServerConstants.SC_KEY_WEB_DEFAULT_PAGE,
file);
}
/**
* Sets the server listen port.
*
* @param port the port at which this server listens
*
* @jmx.managed-attribute
*/
public void setPort(int port) throws RuntimeException {
checkRunning(false);
printWithThread("setPort(" + port + ")");
serverProperties.setProperty(ServerConstants.SC_KEY_PORT, port);
}
/**
* Sets the PrintWriter to which server errors are logged. <p>
*
* Setting this attribute to null disables server error logging
*
* @param pw the PrintWriter to which server messages are logged
*/
public void setErrWriter(PrintWriter pw) {
errWriter = pw;
}
/**
* Sets the PrintWriter to which server messages are logged. <p>
*
* Setting this attribute to null disables server message logging
*
* @param pw the PrintWriter to which server messages are logged
*/
public void setLogWriter(PrintWriter pw) {
logWriter = pw;
}
/**
* Sets whether this server calls System.exit() when shutdown.
*
* @param noExit if true, System.exit() will not be called.
*
* @jmx.managed-attribute
*/
public void setNoSystemExit(boolean noExit) {
printWithThread("setNoSystemExit(" + noExit + ")");
serverProperties.setProperty(ServerConstants.SC_KEY_NO_SYSTEM_EXIT,
noExit);
}
/**
* Sets whether this server restarts on shutdown.
*
* @param restart if true, this server restarts on shutdown
*
* @jmx.managed-attribute
*/
public void setRestartOnShutdown(boolean restart) {
printWithThread("setRestartOnShutdown(" + restart + ")");
serverProperties.setProperty(ServerConstants.SC_KEY_AUTORESTART_SERVER,
restart);
}
/**
* Sets silent mode operation
*
* @param silent if true, then silent mode, else trace messages
* are to be printed
*
* @jmx.managed-attribute
*/
public void setSilent(boolean silent) {
printWithThread("setSilent(" + silent + ")");
serverProperties.setProperty(ServerConstants.SC_KEY_SILENT, silent);
isSilent = silent;
}
/**
* Sets whether to use secure sockets
*
* @param tls true for secure sockets, else false
* @throws RuntimeException if this server is running
*
* @jmx.managed-attribute
*/
public void setTls(boolean tls) {
checkRunning(false);
printWithThread("setTls(" + tls + ")");
serverProperties.setProperty(ServerConstants.SC_KEY_TLS, tls);
}
/**
* Sets whether trace messages go to System.out or the
* DriverManger PrintStream/PrintWriter, if any.
*
* @param trace if true, route JDBC trace messages to System.out
*
* @jmx.managed-attribute
*/
public void setTrace(boolean trace) {
printWithThread("setTrace(" + trace + ")");
serverProperties.setProperty(ServerConstants.SC_KEY_TRACE, trace);
JavaSystem.setLogToSystem(trace);
}
/**
* Sets the path of the root directory from which web content is served.
*
* @param root the root (context) directory from which web content
* is served
*
* @jmx.managed-attribute
*/
public void setWebRoot(String root) {
checkRunning(false);
root = (new File(root)).getAbsolutePath();
printWithThread("setWebRoot(" + root + ")");
if (serverProtocol != ServerConstants.SC_PROTOCOL_HTTP) {
return;
}
serverProperties.setProperty(ServerConstants.SC_KEY_WEB_ROOT, root);
}
/**
* Sets server properties using the specified properties object
*
* @param p The object containing properties to set
*/
public void setProperties(HsqlProperties p) {
checkRunning(false);
if (p != null) {
serverProperties.addProperties(p);
ServerConfiguration.translateAddressProperty(serverProperties);
}
maxConnections = serverProperties.getIntegerProperty(
ServerConstants.SC_KEY_MAX_CONNECTIONS, 16);
JavaSystem.setLogToSystem(isTrace());
isSilent =
serverProperties.isPropertyTrue(ServerConstants.SC_KEY_SILENT);
isRemoteOpen = serverProperties.isPropertyTrue(
ServerConstants.SC_KEY_REMOTE_OPEN_DB);
}
/**
* Starts this server synchronously. <p>
*
* This method waits for current state to change from
* SERVER_STATE_OPENNING. In order to discover the success or failure
* of this operation, server state must be polled or a subclass of Server
* must be used that overrides the setState method to provide state
* change notification.
*
* @return the server state noted at entry to this method
*
* @jmx.managed-operation
* impact="ACTION_INFO"
* description="Invokes asynchronous startup sequence; returns previous state"
*/
public int start() {
printWithThread("start() entered");
int previousState = getState();
if (serverThread != null) {
printWithThread("start(): serverThread != null; no action taken");
return previousState;
}
setState(ServerConstants.SERVER_STATE_OPENING);
serverThread = new ServerThread("HSQLDB Server ");
serverThread.start();
// call synchronized getState() to become owner of the Server Object's monitor
while (getState() == ServerConstants.SERVER_STATE_OPENING) {
try {
Thread.sleep(100);
} catch (InterruptedException e) {}
}
printWithThread("start() exiting");
return previousState;
}
/**
* Stops this server asynchronously. <p>
*
* This method returns immediately, regardless of current state. In order
* to discover the success or failure of this operation, server state must
* be polled or a subclass of Server must be used that overrides the
* setState method to provide state change notification.
*
* @return the server state noted at entry to this method
*
* @jmx.managed-operation
* impact="ACTION_INFO"
* description="Invokes asynchronous shutdown sequence; returns previous state"
*/
public int stop() {
printWithThread("stop() entered");
int previousState = getState();
if (serverThread == null) {
printWithThread("stop() serverThread is null; no action taken");
return previousState;
}
releaseServerSocket();
printWithThread("stop() exiting");
return previousState;
}
/**
* Retrieves whether the specified socket should be allowed
* to make a connection. By default, this method always returns
* true, but it can be overidden to implement hosts allow-deny
* functionality.
*
* @param socket the socket to test.
*/
protected boolean allowConnection(Socket socket) {
return true;
}
/**
* Initializes this server, setting the accepted connection protocol.
*
* @param protocol typically either SC_PROTOCOL_HTTP or SC_PROTOCOL_HSQL
*/
protected void init(int protocol) {
// PRE: This method is only called from the constructor
serverState = ServerConstants.SERVER_STATE_SHUTDOWN;
serverConnSet = new HashSet();
serverId = toString();
serverId = serverId.substring(serverId.lastIndexOf('.') + 1);
serverProtocol = protocol;
serverProperties = ServerConfiguration.newDefaultProperties(protocol);
logWriter = new PrintWriter(System.out);
errWriter = new PrintWriter(System.err);
JavaSystem.setLogToSystem(isTrace());
}
/**
* Sets the server state value.
*
* @param state the new value
*/
protected synchronized void setState(int state) {
serverState = state;
}
/**
* This is called from org.hsqldb.DatabaseManager when a database is
* shutdown. This shuts the server down if it is the last database
*
* @param action a code indicating what has happend
*/
final void notify(int action, int id) {
notifyImpl(action, id);
}
protected void notifyImpl(int action, int id) {
printWithThread("notifiy(" + action + "," + id + ") entered");
if (action != ServerConstants.SC_DATABASE_SHUTDOWN) {
return;
}
releaseDatabase(id);
boolean shutdown = true;
for (int i = 0; i < dbID.length; i++) {
if (dbAlias[i] != null) {
shutdown = false;
}
}
if (!isRemoteOpen && shutdown) {
stop();
}
}
/**
* This releases the resources used for a database.
* Is called with id 0 multiple times for non-existent databases
*/
final synchronized void releaseDatabase(int id) {
Iterator it;
boolean found = false;
printWithThread("releaseDatabase(" + id + ") entered");
// check all slots as a database may be opened by multiple aliases
for (int i = 0; i < dbID.length; i++) {
if (dbID[i] == id && dbAlias[i] != null) {
dbID[i] = 0;
dbAlias[i] = null;
dbPath[i] = null;
dbType[i] = null;
dbProps[i] = null;
}
}
synchronized (serverConnSet) {
it = new WrapperIterator(serverConnSet.toArray(null));
}
while (it.hasNext()) {
ServerConnection sc = (ServerConnection) it.next();
if (sc.dbID == id) {
sc.signalClose();
serverConnSet.remove(sc);
}
}
printWithThread("releaseDatabase(" + id + ") exiting");
}
/**
* Prints the specified message, s, formatted to identify that the print
* operation is against this server instance.
*
* @param msg The message to print
*/
protected void print(String msg) {
PrintWriter writer = logWriter;
if (writer != null) {
writer.println("[" + serverId + "]: " + msg);
writer.flush();
}
}
/**
* Prints value from server's resource bundle, formatted to
* identify that the print operation is against this server instance.
* Value may be localized according to the default JVM locale
*
* @param key the resource key
*/
final void printResource(String key) {
String resource;
StringTokenizer st;
if (serverBundleHandle < 0) {
return;
}
resource = BundleHandler.getString(serverBundleHandle, key);
if (resource == null) {
return;
}
st = new StringTokenizer(resource, "\n\r");
while (st.hasMoreTokens()) {
print(st.nextToken());
}
}
/**
* Prints the stack trace of the Throwable, t, to this Server object's
* errWriter. <p>
*
* @param t the Throwable whose stack trace is to be printed
*/
protected void printStackTrace(Throwable t) {
if (errWriter != null) {
t.printStackTrace(errWriter);
errWriter.flush();
}
}
/**
* Prints the specified message, s, prepended with a timestamp representing
* the current date and time, formatted to identify that the print
* operation is against this server instance.
*
* @param msg the message to print
*/
final void printWithTimestamp(String msg) {
print(HsqlDateTime.getSytemTimeString() + " " + msg);
}
/**
* Prints a message formatted similarly to print(String), additionally
* identifying the current (calling) thread. Replaces old method
* trace(String msg).
*
* @param msg the message to print
*/
protected void printWithThread(String msg) {
if (!isSilent()) {
print("[" + Thread.currentThread() + "]: " + msg);
}
}
/**
* Prints an error message to this Server object's errWriter.
* The message is formatted similarly to print(String),
* additionally identifying the current (calling) thread.
*
* @param msg the message to print
*/
protected void printError(String msg) {
PrintWriter writer = errWriter;
if (writer != null) {
writer.print("[" + serverId + "]: ");
writer.print("[" + Thread.currentThread() + "]: ");
writer.println(msg);
writer.flush();
}
}
/**
* Prints a description of the request encapsulated by the
* Result argument, r.
*
* Printing occurs iff isSilent() is false. <p>
*
* The message is formatted similarly to print(String), additionally
* indicating the connection identifier. <p>
*
* For Server instances, cid is typically the value assigned to each
* ServerConnection object that is unique amongst all such identifiers
* in each distinct JVM session / class loader
* context. <p>
*
* For WebServer instances, a single logical connection actually spawns
* a new physical WebServerConnection object for each request, so the
* cid is typically the underlying session id, since that does not
* change for the duration of the logical connection.
*
* @param cid the connection identifier
* @param r the request whose description is to be printed
*/
final void printRequest(int cid, Result r) {
if (isSilent()) {
return;
}
StringBuffer sb = new StringBuffer();
sb.append(cid);
sb.append(':');
switch (r.mode) {
case ResultConstants.SQLPREPARE : {
sb.append("SQLCLI:SQLPREPARE ");
sb.append(r.getMainString());
break;
}
case ResultConstants.SQLEXECDIRECT : {
if (r.getSize() < 2) {
sb.append(r.getMainString());
} else {
sb.append("SQLCLI:SQLEXECDIRECT:BATCHMODE\n");
Iterator it = r.iterator();
while (it.hasNext()) {
Object[] data = (Object[]) it.next();
sb.append(data[0]).append('\n');
}
}
break;
}
case ResultConstants.SQLEXECUTE : {
sb.append("SQLCLI:SQLEXECUTE:");
if (r.getSize() > 1) {
sb.append("BATCHMODE:");
}
sb.append(r.getStatementID());
/**
* todo - fredt - NOW - fix this without appendStringValueOf
*/
/*
if (r.getSize() == 1) {
sb.append('\n');
StringUtil.appendStringValueOf(r.getParameterData(), sb, true);
}
*/
break;
}
case ResultConstants.SQLFREESTMT : {
sb.append("SQLCLI:SQLFREESTMT:");
sb.append(r.getStatementID());
break;
}
case ResultConstants.GETSESSIONATTR : {
sb.append("HSQLCLI:GETSESSIONATTR");
break;
}
case ResultConstants.SETSESSIONATTR : {
sb.append("HSQLCLI:SETSESSIONATTR:");
sb.append("AUTOCOMMIT ");
sb.append(r.rRoot.data[Session.INFO_AUTOCOMMIT]);
sb.append(" CONNECTION_READONLY ");
sb.append(r.rRoot.data[Session.INFO_CONNECTION_READONLY]);
break;
}
case ResultConstants.SQLENDTRAN : {
sb.append("SQLCLI:SQLENDTRAN:");
switch (r.getEndTranType()) {
case ResultConstants.COMMIT :
sb.append("COMMIT");
break;
case ResultConstants.ROLLBACK :
sb.append("ROLLBACK");
break;
case ResultConstants.SAVEPOINT_NAME_RELEASE :
sb.append("SAVEPOINT_NAME_RELEASE ");
sb.append(r.getMainString());
break;
case ResultConstants.SAVEPOINT_NAME_ROLLBACK :
sb.append("SAVEPOINT_NAME_ROLLBACK ");
sb.append(r.getMainString());
break;
default :
sb.append(r.getEndTranType());
}
break;
}
case ResultConstants.SQLSTARTTRAN : {
sb.append("SQLCLI:SQLSTARTTRAN");
break;
}
case ResultConstants.SQLDISCONNECT : {
sb.append("SQLCLI:SQLDISCONNECT");
break;
}
case ResultConstants.SQLSETCONNECTATTR : {
sb.append("SQLCLI:SQLSETCONNECTATTR:");
switch (r.getConnectionAttrType()) {
case ResultConstants.SQL_ATTR_SAVEPOINT_NAME : {
sb.append("SQL_ATTR_SAVEPOINT_NAME ");
sb.append(r.getMainString());
break;
}
default : {
sb.append(r.getConnectionAttrType());
}
}
break;
}
default : {
sb.append("SQLCLI:MODE:");
sb.append(r.mode);
break;
}
}
print(sb.toString());
}
/**
* return database ID
*/
synchronized final int getDBID(String aliasPath) throws HsqlException {
int semipos = aliasPath.indexOf(';');
String alias = aliasPath;
String filepath = null;
if (semipos != -1) {
alias = aliasPath.substring(0, semipos);
filepath = aliasPath.substring(semipos + 1);
}
int dbIndex = ArrayUtil.find(dbAlias, alias);
if (dbIndex == -1) {
if (filepath == null) {
RuntimeException e =
new RuntimeException("database alias does not exist");
printError("database alias=" + alias + " does not exist");
setServerError(e);
throw e;
} else {
return openDatabase(alias, filepath);
}
} else {
return dbID[dbIndex];
}
}
/**
* Open and return database ID
*/
final int openDatabase(String alias,
String filepath) throws HsqlException {
if (!isRemoteOpen) {
RuntimeException e =
new RuntimeException("remote open not allowed");
printError("Remote database open not allowed");
setServerError(e);
throw e;
}
int i = getFirstEmptyDatabaseIndex();
if (i < -1) {
RuntimeException e =
new RuntimeException("limit of open databases reached");
printError("limit of open databases reached");
setServerError(e);
throw e;
}
HsqlProperties newprops = DatabaseURL.parseURL(filepath, false);
if (newprops == null) {
RuntimeException e = new RuntimeException("invalid database path");
printError("invalid database path");
setServerError(e);
throw e;
}
String path = newprops.getProperty("database");
String type = newprops.getProperty("connection_type");
try {
int dbid = DatabaseManager.getDatabase(type, path, this, newprops);
dbID[i] = dbid;
dbAlias[i] = alias;
dbPath[i] = path;
dbType[i] = type;
dbProps[i] = newprops;
return dbid;
} catch (HsqlException e) {
printError("Database [index=" + i + "db=" + dbType[i] + dbPath[i]
+ ", alias=" + dbAlias[i] + "] did not open: "
+ e.toString());
setServerError(e);
throw e;
}
}
final int getFirstEmptyDatabaseIndex() {
for (int i = 0; i < dbAlias.length; i++) {
if (dbAlias[i] == null) {
return i;
}
}
return -1;
}
/**
* Opens this server's database instances. This method returns true If
* at least one database goes online, otherwise it returns false.
*
* If openning any of the databases is attempted and an exception is
* thrown, the server error is set to this exception.
*
* @throws HsqlException if a database access error occurs
*/
final boolean openDatabases() {
printWithThread("openDatabases() entered");
boolean success = false;
setDBInfoArrays();
for (int i = 0; i < dbAlias.length; i++) {
if (dbAlias[i] == null) {
continue;
}
printWithThread("Opening database: [" + dbType[i] + dbPath[i]
+ "]");
StopWatch sw = new StopWatch();
int id;
try {
id = DatabaseManager.getDatabase(dbType[i], dbPath[i], this,
dbProps[i]);
dbID[i] = id;
success = true;
} catch (HsqlException e) {
printError("Database [index=" + i + "db=" + dbType[i]
+ dbPath[i] + ", alias=" + dbAlias[i]
+ "] did not open: " + e.toString());
setServerError(e);
dbAlias[i] = null;
dbPath[i] = null;
dbType[i] = null;
dbProps[i] = null;
continue;
}
sw.stop();
String msg = "Database [index=" + i + ", id=" + id + ", " + "db="
+ dbType[i] + dbPath[i] + ", alias=" + dbAlias[i]
+ "] opened sucessfully";
print(sw.elapsedTimeToMessage(msg));
}
printWithThread("openDatabases() exiting");
if (isRemoteOpen) {
success = true;
}
if (!success && getServerError() == null) {
// database alias / path list is empty or without full info for any DB
setServerError(Trace.error(Trace.SERVER_NO_DATABASE));
}
return success;
}
/**
* Initialises the database attributes lists from the server properties object.
*/
private void setDBInfoArrays() {
dbAlias = getDBNameArray();
dbPath = new String[dbAlias.length];
dbType = new String[dbAlias.length];
dbID = new int[dbAlias.length];
dbProps = new HsqlProperties[dbAlias.length];
for (int i = 0; i < dbAlias.length; i++) {
if (dbAlias[i] == null) {
continue;
}
String path = getDatabasePath(i, true);
if (path == null) {
dbAlias[i] = null;
continue;
}
HsqlProperties dbURL = DatabaseURL.parseURL(path, false);
if (dbURL == null) {
dbAlias[i] = null;
continue;
}
dbPath[i] = dbURL.getProperty("database");
dbType[i] = dbURL.getProperty("connection_type");
dbProps[i] = dbURL;
}
}
/**
* Returns a possibly sparse array of all server.dbname.n values
* from the properties object.
*/
private String[] getDBNameArray() {
final String prefix = ServerConstants.SC_KEY_DBNAME + ".";
final int prefixLen = prefix.length();
String[] dblist = new String[10];
int maxindex = 0;
try {
Enumeration en = serverProperties.propertyNames();
for (; en.hasMoreElements(); ) {
String key = (String) en.nextElement();
if (!key.startsWith(prefix)) {
continue;
}
try {
int dbnum = Integer.parseInt(key.substring(prefixLen));
maxindex = dbnum < maxindex ? maxindex
: dbnum;
dblist[dbnum] =
serverProperties.getProperty(key).toLowerCase();
} catch (NumberFormatException e) {
printWithThread("dblist: " + e.toString());
}
}
} catch (ArrayIndexOutOfBoundsException e) {
printWithThread("dblist: " + e.toString());
}
return dblist;
}
/**
* Constructs and installs a new ServerSocket instance for this server.
*
* @throws Exception if it is not possible to construct and install
* a new ServerSocket
*/
private void openServerSocket() throws Exception {
String address;
int port;
String[] candidateAddrs;
String emsg;
StopWatch sw;
printWithThread("openServerSocket() entered");
if (isTls()) {
printWithThread("Requesting TLS/SSL-encrypted JDBC");
}
sw = new StopWatch();
socketFactory = HsqlSocketFactory.getInstance(isTls());
address = getAddress();
port = getPort();
if (org.hsqldb.lib.StringUtil.isEmpty(address)
|| ServerConstants.SC_DEFAULT_ADDRESS.equalsIgnoreCase(
address.trim())) {
socket = socketFactory.createServerSocket(port);
} else {
try {
socket = socketFactory.createServerSocket(port, address);
} catch (UnknownHostException e) {
candidateAddrs =
ServerConfiguration.listLocalInetAddressNames();
int messageID;
Object[] messageParameters;
if (candidateAddrs.length > 0) {
messageID = Trace.Server_openServerSocket;
messageParameters = new Object[] {
address, candidateAddrs
};
} else {
messageID = Trace.Server_openServerSocket2;
messageParameters = new Object[]{ address };
}
throw new UnknownHostException(Trace.getMessage(messageID,
true, messageParameters));
}
}
/*
* Following line necessary for Java 1.3 on UNIX. See accept()
* comment elsewhere in this file.
*/
socket.setSoTimeout(1000);
printWithThread("Got server socket: " + socket);
print(sw.elapsedTimeToMessage("Server socket opened successfully"));
if (socketFactory.isSecure()) {
print("Using TLS/SSL-encrypted JDBC");
}
printWithThread("openServerSocket() exiting");
}
/** Prints a timestamped message indicating that this server is online */
private void printServerOnlineMessage() {
String s = getProductName() + " " + getProductVersion() + " is online";
printWithTimestamp(s);
printResource("online.help");
}
/**
* Prints a description of the server properties iff !isSilent().
*/
protected void printProperties() {
Enumeration e;
String key;
String value;
// Avoid the waste of generating each description,
// only for trace() to silently discard it
if (isSilent()) {
return;
}
e = serverProperties.propertyNames();
while (e.hasMoreElements()) {
key = (String) e.nextElement();
value = serverProperties.getProperty(key);
printWithThread(key + "=" + value);
}
}
/**
* Puts this server into the SERVER_CLOSING state, closes the ServerSocket
* and nullifies the reference to it. If the ServerSocket is already null,
* this method exists immediately, otherwise, the result is to fully
* shut down the server.
*/
private void releaseServerSocket() {
printWithThread("releaseServerSocket() entered");
if (socket != null) {
printWithThread("Releasing server socket: [" + socket + "]");
setState(ServerConstants.SERVER_STATE_CLOSING);
try {
socket.close();
} catch (IOException e) {
printError("Exception closing server socket");
printError("releaseServerSocket(): " + e);
}
socket = null;
}
printWithThread("releaseServerSocket() exited");
}
/**
* Attempts to bring this server fully online by opening
* a new ServerSocket, obtaining the hosted databases,
* notifying the status waiter thread (if any) and
* finally entering the listen loop if all else succeeds.
* If any part of the process fails, then this server enters
* its shutdown sequence.
*/
private void run() {
StopWatch sw;
ThreadGroup tg;
String tgName;
printWithThread("run() entered");
print("Initiating startup sequence...");
printProperties();
sw = new StopWatch();
setServerError(null);
try {
// Faster init first:
// It is huge waste to fully open the databases, only
// to find that the socket address is already in use
openServerSocket();
} catch (Exception e) {
setServerError(e);
printError("run()/openServerSocket(): ");
printStackTrace(e);
shutdown(true);
return;
}
tgName = "HSQLDB Connections @"
+ Integer.toString(this.hashCode(), 16);
tg = new ThreadGroup(tgName);
tg.setDaemon(false);
serverConnectionThreadGroup = tg;
// Mount the databases this server is supposed to host.
// This may take some time if the databases are not all
// already open.
if (openDatabases() == false) {
setServerError(null);
printError("Shutting down because there are no open databases");
shutdown(true);
return;
}
// At this point, we have a valid server socket and
// a valid hosted database set, so its OK to start
// listening for connections.
setState(ServerConstants.SERVER_STATE_ONLINE);
print(sw.elapsedTimeToMessage("Startup sequence completed"));
printServerOnlineMessage();
try {
/*
* This loop is necessary for UNIX w/ Sun Java 1.3 because
* in that case the socket.close() elsewhere will not
* interrupt this accept().
*/
while (true) {
try {
handleConnection(socket.accept());
} catch (java.io.InterruptedIOException e) {}
}
} catch (IOException e) {
if (getState() == ServerConstants.SERVER_STATE_ONLINE) {
setServerError(e);
printError(this + ".run()/handleConnection(): ");
printStackTrace(e);
}
} catch (Throwable t) {
printWithThread(t.toString());
} finally {
shutdown(false); // or maybe getServerError() != null?
}
}
/**
* Sets this Server's last encountered error state.
*
* @param t The new value for the server error
*/
protected void setServerError(Throwable t) {
serverError = t;
}
/**
* External method to shut down this server.
*/
public void shutdown() {
shutdown(false);
}
/**
* Shuts down this server.
*
* @param error true if shutdown is in response to an error
* state, else false
*/
protected synchronized void shutdown(boolean error) {
if (serverState == ServerConstants.SERVER_STATE_SHUTDOWN) {
return;
}
StopWatch sw;
printWithThread("shutdown() entered");
sw = new StopWatch();
print("Initiating shutdown sequence...");
releaseServerSocket();
DatabaseManager.deRegisterServer(this);
if (dbPath != null) {
for (int i = 0; i < dbPath.length; i++) {
releaseDatabase(dbID[i]);
}
}
// Be nice and let applications exit if there are no
// running connection threads
if (serverConnectionThreadGroup != null) {
if (!serverConnectionThreadGroup.isDestroyed()) {
for (int i = 0; serverConnectionThreadGroup.activeCount() > 0;
i++) {
int count;
try {
Thread.sleep(100);
} catch (Exception e) {
// e.getMessage();
}
}
try {
serverConnectionThreadGroup.destroy();
printWithThread(serverConnectionThreadGroup.getName()
+ " destroyed");
} catch (Throwable t) {
printWithThread(serverConnectionThreadGroup.getName()
+ " not destroyed");
printWithThread(t.toString());
}
}
serverConnectionThreadGroup = null;
}
serverThread = null;
setState(ServerConstants.SERVER_STATE_SHUTDOWN);
print(sw.elapsedTimeToMessage("Shutdown sequence completed"));
if (isNoSystemExit()) {
printWithTimestamp("SHUTDOWN : System.exit() was not called");
printWithThread("shutdown() exited");
} else {
printWithTimestamp("SHUTDOWN : System.exit() is called next");
printWithThread("shutdown() exiting...");
try {
System.exit(0);
} catch (Throwable t) {
printWithThread(t.toString());
}
}
}
/**
* Prints message for the specified key, without any special
* formatting. The message content comes from the server
* resource bundle and thus may localized according to the default
* JVM locale.<p>
*
* Uses System.out directly instead of Trace.printSystemOut() so it
* always prints, regardless of Trace settings.
*
* @param key for message
*/
protected static void printHelp(String key) {
System.out.print(BundleHandler.getString(serverBundleHandle, key));
}
}
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