/*
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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
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE
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* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
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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
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying 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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* Portions Copyright 2007 Sun Microsystems, Inc.
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*/
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package org.opends.quicksetup.util;
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import org.opends.quicksetup.Installation;
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import org.opends.quicksetup.ApplicationException;
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import org.opends.server.util.ServerConstants;
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import java.util.List;
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/**
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* Checks a server health by starting a server and looking through its
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* log messages for signs that things may not be well.
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*/
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public class ServerHealthChecker {
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private Installation installation = null;
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private List<String> errors = null;
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/**
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* Regular expression used to determine whether or not a server
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* is healthy enough for upgrade by looking through its startup
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* logs.
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*/
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static private final String UNHEALTHY_SERVER_LOG_REGEX =
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new StringBuilder()
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.append(".*(")
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.append(ServerConstants.ERROR_SEVERITY_FATAL)
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.append("|")
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.append(ServerConstants.ERROR_SEVERITY_SEVERE_ERROR)
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.append(")+.*").toString();
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/**
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* Creates an instance.
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* @param installation of the server to check
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*/
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public ServerHealthChecker(Installation installation) {
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this.installation = installation;
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}
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/**
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* Diagnoses the server's health by stopping (if necessary) and starting
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* the server in process and analyzing the resulting log messages.
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* Following the call to this method the server is left in a stopped state.
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* @throws ApplicationException if things go wrong
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*/
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public void checkServer() throws ApplicationException {
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InProcessServerController control = null;
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try {
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control = new InProcessServerController(installation);
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if (installation.getStatus().isServerRunning()) {
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new ServerController(installation).stopServer();
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}
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OperationOutput op = control.startServer(true);
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errors = op.getErrorMessages(UNHEALTHY_SERVER_LOG_REGEX);
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} catch (Exception e) {
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if (e instanceof ApplicationException) {
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throw (ApplicationException)e;
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} else {
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throw new ApplicationException(ApplicationException.Type.APPLICATION,
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"Server health check failed. Please resolve the following " +
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"before running the upgrade " +
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"tool: " + e.getLocalizedMessage(), e);
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}
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} finally {
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if (control != null) {
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control.stopServer();
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}
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}
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}
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/**
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* Gets a list of Strings representing error messages that resulted
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* from calling <code>checkServer</code>; null if <code>checkServer</code>
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* has not been called.
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* @return List of strings containing error messages
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*/
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public List<String> getProblemMessages() {
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return errors;
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}
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}
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