Glassfish example source code file (ServerDirsSelector.java)

This example Glassfish source code file (ServerDirsSelector.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, domaindirs, domaindirs, file, instancedirs, io, ioexception, ioexception, serverdirs, serverdirsselector, serverdirsselector, string, string

The Glassfish ServerDirsSelector.java source code

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 * 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.
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package com.sun.enterprise.admin.util;

import com.sun.enterprise.util.io.DomainDirs;
import com.sun.enterprise.util.io.InstanceDirs;
import com.sun.enterprise.util.io.ServerDirs;
import java.io.File;
import java.io.IOException;
import org.glassfish.api.admin.CommandException;

/**
 * Based on the presence or absence of values for:
 * <ul>
 * <li>domain directory parent (e.g., ${installDir}/domains
 * <li>server name (domain or instance)
 * <li>node directory
 * <li>node name
 * </ul>
 *
 * select the correct directories object for the requested domain or node.
 *
 * @author Byron Nevins
 * @author Tim Quinn (just refactoring, rearranging the code to here)
 */
public class ServerDirsSelector {

    private File userSpecifiedDomainDirParent;
    private String userSpecifiedServerName;
    private String userSpecifiedNodeDir;           // nodeDirRoot
    private String userSpecifiedNode;

    private DomainDirs domainDirs = null;
    private InstanceDirs instanceDirs = null;


    /**
     * Creates a selector for choosing the correct set of directories.
     * @param domainDirParent parent of the domain directory file(s)
     * @param serverName name of the requested instance or domain
     * @param nodeDir path to the node directory
     * @param node name of the node
     * @return
     * @throws CommandException
     * @throws IOException
     */
    public static ServerDirsSelector getInstance(
            final File domainDirParent,
            final String serverName,
            final String nodeDir,
            final String node) throws CommandException, IOException {

        final ServerDirsSelector helper = new ServerDirsSelector(
                domainDirParent,
                serverName,
                nodeDir,
                node);

        helper.validateDomainOrInstance();
        return helper;
    }

    public ServerDirs dirs() {
        return selectDirs();
    }

    private ServerDirsSelector(
            final File domainDirParent,
            final String serverName,
            final String nodeDir,
            final String node) {
        userSpecifiedDomainDirParent = domainDirParent;
        userSpecifiedServerName = serverName;
        userSpecifiedNodeDir = nodeDir;
        userSpecifiedNode = node;
    }


    /**
     * make sure the parameters make sense for either an instance or a domain.
     */
    private void validateDomainOrInstance() throws CommandException, IOException {

        
        // case 1: since ddp is specified - it MUST be a domain
        if (userSpecifiedDomainDirParent != null) {
            domainDirs = new DomainDirs(userSpecifiedDomainDirParent, userSpecifiedServerName);
        }
        //case 2: if either of these are set then it MUST be an instance
        else if (userSpecifiedNode != null || userSpecifiedNodeDir != null) {
            instanceDirs = new InstanceDirs(userSpecifiedNodeDir, userSpecifiedNode, userSpecifiedServerName);
        }
        // case 3: nothing is specified -- use default domain as in v3.0
        else if (userSpecifiedServerName == null) {
            domainDirs = new DomainDirs(userSpecifiedDomainDirParent, userSpecifiedServerName);
        }
        // case 4: userSpecifiedServerName is set and the other 3 are all null
        // we need to figure out if it's a DAS or an instance
        else {
            try {
                domainDirs = new DomainDirs(userSpecifiedDomainDirParent, userSpecifiedServerName);
                return;
            }
            catch (IOException e) {
                // handled below
            }

            instanceDirs = new InstanceDirs(userSpecifiedNodeDir, userSpecifiedNode, userSpecifiedServerName);
        }
    }

    public boolean isInstance() {
        return instanceDirs != null;
    }

    private boolean isDomain() {
        return domainDirs != null;
    }

    private ServerDirs selectDirs() {
        if (isInstance())
                return instanceDirs.getServerDirs();
            else
                return domainDirs.getServerDirs();
    }
}