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