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Glassfish example source code file (CreateHTTPHealthCheckerCommand.java)
The Glassfish CreateHTTPHealthCheckerCommand.java source code/* * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER. * * Copyright (c) 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: * "Portions Copyright [year] [name of copyright owner]" * * Contributor(s): * If you wish your version of this file to be governed by only the CDDL or * 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 * only if the new code is made subject to such option by the copyright * holder. */ package org.glassfish.loadbalancer.admin.cli; import java.util.logging.Logger; import java.util.ArrayList; import java.util.List; import java.beans.PropertyVetoException; import org.jvnet.hk2.annotations.*; import org.jvnet.hk2.component.*; import org.jvnet.hk2.config.*; import org.glassfish.api.Param; import org.glassfish.api.ActionReport; import com.sun.enterprise.util.LocalStringManagerImpl; import org.glassfish.internal.api.Target; import com.sun.enterprise.config.serverbeans.Domain; import com.sun.enterprise.config.serverbeans.ClusterRef; import com.sun.enterprise.config.serverbeans.ServerRef; import com.sun.enterprise.config.serverbeans.HealthChecker; import com.sun.enterprise.config.serverbeans.LbConfigs; import com.sun.enterprise.config.serverbeans.LbConfig; import org.glassfish.api.admin.*; import org.glassfish.config.support.TargetType; import org.glassfish.config.support.CommandTarget; /** * This is a remote command that creates health-checker config for cluster or * server. * @author Yamini K B */ @Service(name = "create-http-health-checker") @Scoped(PerLookup.class) @TargetType(value={CommandTarget.STANDALONE_INSTANCE, CommandTarget.CLUSTER}) @org.glassfish.api.admin.ExecuteOn(RuntimeType.DAS) public final class CreateHTTPHealthCheckerCommand implements AdminCommand { @Param(optional=true, defaultValue="10") String timeout; @Param(optional=true, defaultValue="30") String interval; @Param(optional=true, defaultValue="/") String url; @Param(optional=true) String config; @Param(primary=true) String target; @Inject Domain domain; @Inject LbConfigs lbconfigs; @Inject Target tgt; @Inject Logger logger; private ActionReport report; final private static LocalStringManagerImpl localStrings = new LocalStringManagerImpl(CreateHTTPHealthCheckerCommand.class); @Override public void execute(AdminCommandContext context) { report = context.getActionReport(); report.setActionExitCode(ActionReport.ExitCode.SUCCESS); if (config != null) { LbConfig lbConfig = lbconfigs.getLbConfig(config); createHealthCheckerInternal(url,interval,timeout,lbConfig, config ,target); } else { List<LbConfig> lbConfigs = lbconfigs.getLbConfig(); if (lbConfigs.size() == 0) { String msg = localStrings.getLocalString("NoLbConfigsElement", "No LB configs defined"); logger.warning(msg); report.setActionExitCode(ActionReport.ExitCode.FAILURE); report.setMessage(msg); return; } List<LbConfig> match = null; match = matchLbConfigToTarget(lbConfigs, target); if ( (match == null) || (match.size() == 0) ) { String msg = localStrings.getLocalString("UnassociatedTarget", "No LB config references target {0}", target); logger.warning(msg); report.setActionExitCode(ActionReport.ExitCode.FAILURE); report.setMessage(msg); return; } for (LbConfig lc:match){ createHealthCheckerInternal(url,interval,timeout, lc, lc.getName(), target); } } } /** * This is to create a health checker for a cluster configuration. By * default the healh checker will be configured. This applies only * to our native load balancer. * * @param url the URL to ping so as to determine the health state * of a listener. * * @param interval specifies the interval in seconds at which health * checks of unhealthy instances carried out to check if the instances * has turned healthy. Default value is 30 seconds. A value of 0 would * imply that health check is disabled. * * @param timeout timeout interval in seconds within which response * should be obtained for a health check request; else the instance would * be considered unhealthy.Default value is 10 seconds. * * @param lbConfig the load balancer configuration bean * @param lbConfigName the load balancer configuration's name * * @param target name of the target - cluster or stand alone * server instance * * @throws CommandException If the operation is failed */ private void createHealthCheckerInternal(String url, String interval, String timeout, LbConfig lbConfig, String lbConfigName, String target) { // invalid lb config name if (lbConfigName == null) { String msg = localStrings.getLocalString("InvalidLbConfigName", "Invalid LB configuration."); report.setActionExitCode(ActionReport.ExitCode.FAILURE); report.setMessage(msg); return; } lbConfigName = lbConfig.getName(); // print diagnostics msg logger.fine("[LB-ADMIN] createHealthChecker called - URL " + url + ", Interval " + interval + ", Time out " + timeout + ", LB Config " + lbConfigName + ", Target " + target); // null target if (target == null) { String msg = localStrings.getLocalString("Nulltarget", "Null target"); report.setActionExitCode(ActionReport.ExitCode.FAILURE); report.setMessage(msg); return; } // target is a cluster if (tgt.isCluster(target)) { ClusterRef cRef = lbConfig.getRefByRef(ClusterRef.class, target); // cluster is not associated to this lb config if (cRef == null){ String msg = localStrings.getLocalString("UnassociatedCluster", "Load balancer configuration [{0}] does not have a reference to the given cluster [{1}].", lbConfigName, target); report.setActionExitCode(ActionReport.ExitCode.FAILURE); report.setMessage(msg); return; } if ( (cRef != null) && (cRef.getHealthChecker() == null) ) { try { addHealthChecker(cRef); } catch (TransactionFailure ex) { String msg = localStrings.getLocalString("FailedToAddHC", "Failed to add health checker"); report.setActionExitCode(ActionReport.ExitCode.FAILURE); report.setMessage(msg); report.setFailureCause(ex); return; } logger.info("http_lb_admin.HealthCheckerCreated" + target); } else { String msg = localStrings.getLocalString("HealthCheckerExists", "Health checker server/cluster [{0}] already exists.", target); report.setActionExitCode(ActionReport.ExitCode.FAILURE); report.setMessage(msg); return; } // target is a server } else if (domain.isServer(target)) { ServerRef sRef = lbConfig.getRefByRef(ServerRef.class, target); // server is not associated to this lb config if (sRef == null){ String msg = localStrings.getLocalString("UnassociatedServer", "Load balancer configuration [{0}] does not have a reference to the given server [{1}].", lbConfigName, target); report.setActionExitCode(ActionReport.ExitCode.FAILURE); report.setMessage(msg); return; } if ((sRef != null) && (sRef.getHealthChecker() == null) ){ try { addHealthChecker(sRef); } catch (TransactionFailure ex) { String msg = localStrings.getLocalString("FailedToAddHC", "Failed to add health checker"); report.setActionExitCode(ActionReport.ExitCode.FAILURE); report.setMessage(msg); report.setFailureCause(ex); return; } logger.info(localStrings.getLocalString("http_lb_admin.HealthCheckerCreated", "Health checker created for target {0}", target)); } else { String msg = localStrings.getLocalString("HealthCheckerExists", "Health checker server/cluster [{0}] already exists.", target); report.setActionExitCode(ActionReport.ExitCode.FAILURE); report.setMessage(msg); return; } // unknown target } else { String msg = localStrings.getLocalString("InvalidTarget", "Invalid target", target); report.setActionExitCode(ActionReport.ExitCode.FAILURE); report.setMessage(msg); return; } } private void addHealthChecker(final ClusterRef ref) throws TransactionFailure { ConfigSupport.apply(new SingleConfigCode<ClusterRef>() { @Override public Object run(ClusterRef param) throws PropertyVetoException, TransactionFailure { HealthChecker hc = param.createChild(HealthChecker.class); if (url != null) { hc.setUrl(url); } if (interval != null) { hc.setIntervalInSeconds(interval); } if (timeout != null) { hc.setTimeoutInSeconds(timeout); } param.setHealthChecker(hc); return Boolean.TRUE; } }, ref); } private void addHealthChecker(final ServerRef ref) throws TransactionFailure { ConfigSupport.apply(new SingleConfigCode<ServerRef>() { @Override public Object run(ServerRef param) throws PropertyVetoException, TransactionFailure { HealthChecker hc = param.createChild(HealthChecker.class); if (url != null) { hc.setUrl(url); } if (interval != null) { hc.setIntervalInSeconds(interval); } if (timeout != null) { hc.setTimeoutInSeconds(timeout); } param.setHealthChecker(hc); return Boolean.TRUE; } }, ref); } /** * Returns an array of LbConfigs that has a reference to the target * server or cluster. If there are no references found for the * target or the arguments are null, this method returns null. * * @param lbConfigs array of existing LbConfigs in the system * @param target name of server or cluster * * @return array of LbConfigs that has a ref to the target server * */ private List<LbConfig> matchLbConfigToTarget(List Other Glassfish examples (source code examples)Here is a short list of links related to this Glassfish CreateHTTPHealthCheckerCommand.java source code file: |
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