/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
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* or http://forgerock.org/license/CDDLv1.0.html.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at legal-notices/CDDLv1_0.txt.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2006-2008 Sun Microsystems, Inc.
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* Portions copyright 2012-2013 ForgeRock AS.
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*/
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package org.opends.quicksetup;
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import static org.opends.server.util.ServerConstants.SERVER_LOCK_FILE_NAME;
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import static org.opends.server.util.ServerConstants.LOCK_FILE_SUFFIX;
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import org.opends.server.core.LockFileManager;
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import org.opends.quicksetup.util.Utils;
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import java.io.File;
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/**
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* This class represents the current state of a particular installation.
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*/
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public class Status {
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private Installation installation;
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/**
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* Creates a status instance of the installation indicated by the
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* input parameter.
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* @param installation physical installation
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*/
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public Status(Installation installation) {
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this.installation = installation;
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}
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/**
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* Returns if the server is running on the given path.
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* NOTE: this method is to be called only when the OpenDS.jar class has
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* already been loaded as it uses classes in that jar.
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*
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* LIMITATIONS:
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* If the locks directory does not exist the mechanism fails if the server is
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* stopped. However if the server.lock does not exist AND the server is not
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* running the mechanism should work most of the times (see failing case 3).
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*
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* The cases where this mechanism does not work are:
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*
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* 1. The user deletes/renames the locks directory.
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* 2. The user deletes/renames the server.lock file AND the server is running.
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* 3. The server is not running but the user that is running the code does not
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* have file system access rights.
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* 4. The server is not running and another process has a lock on the file.
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* @return <CODE>true</CODE> if the server is running and <CODE>false</CODE>
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* otherwise.
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*/
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public boolean isServerRunning() {
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boolean isServerRunning;
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String lockFileName = SERVER_LOCK_FILE_NAME + LOCK_FILE_SUFFIX;
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String lockFile =
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Utils.getPath(new File(installation.getLocksDirectory(),
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lockFileName));
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StringBuilder failureReason = new StringBuilder();
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try {
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if (LockFileManager.acquireExclusiveLock(lockFile,
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failureReason)) {
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LockFileManager.releaseLock(lockFile,
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failureReason);
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isServerRunning = false;
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} else {
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isServerRunning = true;
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}
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}
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catch (Throwable t) {
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// Assume that if we cannot acquire the lock file the
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// server is running.
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isServerRunning = true;
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}
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return isServerRunning;
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}
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}
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