Glassfish example source code file (DeleteLocalInstanceCommand.java)

This example Glassfish source code file (DeleteLocalInstanceCommand.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Glassfish tags/keywords

commandexception, commandexception, commandvalidationexception, file, instance_dotted_name, io, localinstancecommand, log, logging, map, override, override, param, remotecommand, remotecommand, string, string, util

The Glassfish DeleteLocalInstanceCommand.java source code

/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * only the GPL Version 2, indicate your decision by adding "[Contributor]
 * elects to include this software in this distribution under the [CDDL or GPL
 * Version 2] license."  If you don't indicate a single choice of license, a
 * recipient has the option to distribute your version of this file under
 * either the CDDL, the GPL Version 2 or to extend the choice of license to
 * its licensees as provided above.  However, if you add GPL Version 2 code
 * and therefore, elected the GPL Version 2 license, then the option applies
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 */
package com.sun.enterprise.admin.cli.cluster;

import com.sun.enterprise.universal.process.Jps;
import com.sun.enterprise.universal.process.ProcessUtils;
import com.sun.enterprise.util.StringUtils;
import com.sun.enterprise.util.io.FileUtils;
import java.io.*;
import java.util.*;
import java.util.logging.Level;
import java.util.logging.Logger;

import org.jvnet.hk2.annotations.*;
import org.jvnet.hk2.component.*;
import org.glassfish.api.Param;
import org.glassfish.api.admin.*;

import com.sun.enterprise.admin.cli.*;
import com.sun.enterprise.admin.cli.remote.RemoteCommand;
import com.sun.enterprise.util.ObjectAnalyzer;

/**
 * Delete a local server instance.
 * Wipeout the node dir if it is the last instance under the node
 *
 * Performance Note:  getServerDirs().getServerDir() is all inlined by the JVM
 * because the class instance is immutable.
 *
 * @author Byron Nevins
 */
@Service(name = "delete-local-instance")
@Scoped(PerLookup.class)
public class DeleteLocalInstanceCommand extends LocalInstanceCommand {

    @Param(name = "instance_name", primary = true, optional = true)
    private String instanceName0;

    /** initInstance goes to great lengths to figure out the correct directory structure.
     * We don't care about such errors.  If the dir is not there -- then this is a
     * simple error about trying to delete an instance that doesn't exist...
     * Thank goodness for overriding methods!!
     * @throws CommandException
     */
    @Override
    protected void initInstance() throws CommandException {
        try {
            super.initInstance();
        }
        catch (CommandException e) {
            throw e;
        }
        catch (Exception e) {
            throw new CommandException(Strings.get("DeleteInstance.noInstance"));
        }
    }

    /**
     * We most definitely do not want to create directories for nodes here!!
     * @param f the directory to create
     */
    protected boolean mkdirs(File f) {
        return false;
    }

    @Override
    protected void validate()
            throws CommandException, CommandValidationException {
        instanceName = instanceName0;
        super.validate();
        if (!StringUtils.ok(getServerDirs().getServerName()))
            throw new CommandException(Strings.get("DeleteInstance.noInstanceName"));

        File dasProperties = getServerDirs().getDasPropertiesFile();

        if (dasProperties.isFile()) {
            setDasDefaults(dasProperties);
        }

        if (!getServerDirs().getServerDir().isDirectory())
            throw new CommandException(Strings.get("DeleteInstance.noWhack",
                    getServerDirs().getServerDir()));
    }

    /**
     */
    @Override
    protected int executeCommand()
            throws CommandException, CommandValidationException {
        if (isRunning()) {
            int prevpid = getPrevPid();
            Map<String, Integer> procs = Jps.getProcessTable();
            Set<Map.Entry set = procs.entrySet();
            Iterator<Map.Entry it = set.iterator();
            while(it.hasNext()) {
                Map.Entry<String,Integer> entry = it.next();
            }
            
            throw new CommandException(Strings.get("DeleteInstance.running"));
        }

        doRemote();
        whackFilesystem();
        return SUCCESS;
    }

    /**
     * Ask DAS to wipe it out from domain.xml
     * If DAS isn't running -- ERROR -- return right away with a thrown Exception
     * If DAS is running, and instance not registered on DAS, do not unregister instance -- OK
     * If DAS is running, and instance is registered on DAS, then unregister instance -- OK
     *      - If _unregister-instance is successful - OK
     *      - If _unregister-instance fails - ERROR - Exception thrown
     */
    private void doRemote() throws CommandException {
        if (!isDASRunning()) {
            String newString = Strings.get("DeleteInstance.remoteError",
                    programOpts.getHost(), "" + programOpts.getPort());
            throw new CommandException(newString);
        }

        if (isRegisteredToDas()) {
            RemoteCommand rc = new RemoteCommand("_unregister-instance", programOpts, env);
            rc.execute("_unregister-instance",
                    "--node", getServerDirs().getServerParentDir().getName(),
                    getServerDirs().getServerName());
        }
    }

    private boolean isDASRunning() {
        try {
            getUptime();
            return true;
        } catch (CommandException ex) {
            return false;
        }
    }

    /**
     * If the instance is not registered on DAS (server xml entry doesn't exist 
     * in domain.xml), the get command will throw a CommandException
     */
    private boolean isRegisteredToDas() {
        boolean isRegistered = false;
        RemoteCommand rc = null;
        String INSTANCE_DOTTED_NAME = "servers.server." + instanceName;
        try {
            rc = new RemoteCommand("get", this.programOpts, this.env);
            rc.executeAndReturnOutput("get", INSTANCE_DOTTED_NAME);
            isRegistered = true;
        } catch (CommandException ce) {
            isRegistered = false;
        }
        return isRegistered;
    }
}