/*
* Licensed to the Apache Software Foundation (ASF) under one or more contributor license
* agreements. See the NOTICE file distributed with this work for additional information regarding
* copyright ownership. The ASF licenses this file to You under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the License. You may obtain a
* copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software distributed under the License
* is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
* or implied. See the License for the specific language governing permissions and limitations under
* the License.
*/
package org.apache.geode.management.internal;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.geode.distributed.internal.ClusterConfigurationService;
import org.apache.logging.log4j.Logger;
import org.apache.geode.CancelException;
import org.apache.geode.SystemFailure;
import org.apache.geode.cache.Cache;
import org.apache.geode.cache.CacheFactory;
import org.apache.geode.cache.GemFireCache;
import org.apache.geode.cache.execute.Function;
import org.apache.geode.cache.execute.FunctionContext;
import org.apache.geode.cache.execute.FunctionService;
import org.apache.geode.distributed.DistributedSystem;
import org.apache.geode.distributed.internal.membership.InternalDistributedMember;
import org.apache.geode.distributed.internal.tcpserver.TcpHandler;
import org.apache.geode.distributed.internal.tcpserver.TcpServer;
import org.apache.geode.internal.InternalEntity;
import org.apache.geode.internal.cache.GemFireCacheImpl;
import org.apache.geode.internal.logging.LogService;
import org.apache.geode.management.AlreadyRunningException;
import org.apache.geode.management.ManagementService;
import org.apache.geode.management.internal.JmxManagerAdvisor.JmxManagerProfile;
public class JmxManagerLocator implements TcpHandler {
private static final Logger logger = LogService.getLogger();
private GemFireCacheImpl cache;
public JmxManagerLocator(GemFireCacheImpl gfc) {
this.cache = gfc;
}
@Override
public Object processRequest(Object request) throws IOException {
assert request instanceof JmxManagerLocatorRequest;
return findJmxManager((JmxManagerLocatorRequest) request);
}
@Override
public void endRequest(Object request, long startTime) {
// nothing needed
}
@Override
public void endResponse(Object request, long startTime) {
// nothing needed
}
@Override
public void shutDown() {
// nothing needed
}
public void restarting(DistributedSystem ds, GemFireCache cache,
ClusterConfigurationService sharedConfig) {
this.cache = (GemFireCacheImpl) cache;
}
@Override
public void init(TcpServer tcpServer) {
// nothing needed
}
private JmxManagerLocatorResponse findJmxManager(JmxManagerLocatorRequest request) {
JmxManagerLocatorResponse result = null;
if (logger.isDebugEnabled()) {
logger.debug("Locator requested to find or start jmx manager");
}
List<JmxManagerProfile> alreadyManaging =
this.cache.getJmxManagerAdvisor().adviseAlreadyManaging();
if (alreadyManaging.isEmpty()) {
List<JmxManagerProfile> willingToManage =
this.cache.getJmxManagerAdvisor().adviseWillingToManage();
if (!willingToManage.isEmpty()) {
synchronized (this) {
alreadyManaging = this.cache.getJmxManagerAdvisor().adviseAlreadyManaging();
if (alreadyManaging.isEmpty()) {
willingToManage = this.cache.getJmxManagerAdvisor().adviseWillingToManage();
if (!willingToManage.isEmpty()) {
JmxManagerProfile p = willingToManage.get(0);
if (p.getDistributedMember().equals(this.cache.getMyId())) {
if (logger.isDebugEnabled()) {
logger.debug("Locator starting jmx manager in its JVM");
}
try {
ManagementService.getManagementService(this.cache).startManager();
} catch (CancelException ex) {
// ignore
} catch (VirtualMachineError err) {
SystemFailure.initiateFailure(err);
// If this ever returns, rethrow the error. We're poisoned
// now, so don't let this thread continue.
throw err;
} catch (Throwable t) {
SystemFailure.checkFailure();
return new JmxManagerLocatorResponse(null, 0, false, t);
}
} else {
p = startJmxManager(willingToManage);
if (p != null) {
if (logger.isDebugEnabled()) {
logger.debug("Locator started jmx manager in {}", p.getDistributedMember());
}
}
// bug 46041 is caused by a race in which the function reply comes
// before we have received the profile update. So pause for a bit
// if our advisor still does not know about a manager and the member
// we asked to start one is still in the ds.
alreadyManaging = this.cache.getJmxManagerAdvisor().adviseAlreadyManaging();
int sleepCount = 0;
while (sleepCount < 20 && alreadyManaging.isEmpty()
&& this.cache.getDistributionManager().getDistributionManagerIds()
.contains(p.getDistributedMember())) {
sleepCount++;
try {
Thread.sleep(100);
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
}
alreadyManaging = this.cache.getJmxManagerAdvisor().adviseAlreadyManaging();
}
}
if (alreadyManaging.isEmpty()) {
alreadyManaging = this.cache.getJmxManagerAdvisor().adviseAlreadyManaging();
}
}
}
} // sync
}
}
if (!alreadyManaging.isEmpty()) {
JmxManagerProfile p = alreadyManaging.get(0);
result = new JmxManagerLocatorResponse(p.getHost(), p.getPort(), p.getSsl(), null);
if (logger.isDebugEnabled()) {
logger.debug("Found jmx manager: " + p);
}
} else {
if (logger.isDebugEnabled()) {
logger.debug("Did not find a jmx manager");
}
result = new JmxManagerLocatorResponse();
}
return result;
}
private JmxManagerProfile startJmxManager(List<JmxManagerProfile> willingToManage) {
for (JmxManagerProfile p : willingToManage) {
if (sendStartJmxManager(p.getDistributedMember())) {
return p;
}
}
return null;
}
private boolean sendStartJmxManager(InternalDistributedMember distributedMember) {
try {
ArrayList<Object> resultContainer = (ArrayList<Object>) FunctionService
.onMember(distributedMember).execute(new StartJmxManagerFunction()).getResult();
Object result = resultContainer.get(0);
if (result instanceof Boolean) {
return ((Boolean) result).booleanValue();
} else {
logger.info("Could not start jmx manager on {} because {}", distributedMember, result);
return false;
}
} catch (RuntimeException ex) {
if (!this.cache.getDistributionManager().getDistributionManagerIdsIncludingAdmin()
.contains(distributedMember)) {
// if the member went away then just return false
logger.info("Could not start jmx manager on {} because of {}", distributedMember,
ex.getMessage(), ex);
return false;
} else {
throw ex;
}
}
}
public static class StartJmxManagerFunction implements Function, InternalEntity {
private static final long serialVersionUID = -2860286061903069789L;
public static final String ID = StartJmxManagerFunction.class.getName();
@Override
public void execute(FunctionContext context) {
try {
Cache cache = CacheFactory.getAnyInstance();
if (cache != null) {
ManagementService ms = ManagementService.getExistingManagementService(cache);
if (ms != null) {
if (!ms.isManager()) { // see bug 45922
ms.startManager();
}
context.getResultSender().lastResult(Boolean.TRUE);
}
}
context.getResultSender().lastResult(Boolean.FALSE);
} catch (AlreadyRunningException ok) {
context.getResultSender().lastResult(Boolean.TRUE);
} catch (Exception e) {
context.getResultSender().lastResult("Exception in StartJmxManager =" + e.getMessage());
}
}
@Override
public String getId() {
return StartJmxManagerFunction.ID;
}
@Override
public boolean hasResult() {
return true;
}
@Override
public boolean optimizeForWrite() {
// no need of optimization since read-only.
return false;
}
@Override
public boolean isHA() {
return false;
}
}
}