/*
* Copyright 2013 the original author or authors.
*
* Licensed 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.springframework.yarn.am.monitor;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.yarn.api.records.Container;
import org.apache.hadoop.yarn.api.records.ContainerId;
import org.apache.hadoop.yarn.api.records.ContainerState;
import org.apache.hadoop.yarn.api.records.ContainerStatus;
import org.apache.hadoop.yarn.util.ConverterUtils;
import org.springframework.util.StringUtils;
import org.springframework.yarn.listener.ContainerMonitorListener.ContainerMonitorState;
/**
* Default implementation of {@link ContainerMonitor} which simple
* tracks number of total and completed containers.
*
* @author Janne Valkealahti
*
*/
public class DefaultContainerMonitor extends AbstractMonitor implements ContainerAware, ContainerMonitor {
private final static Log log = LogFactory.getLog(DefaultContainerMonitor.class);
/**
* Containers which has been allocated. These are considered as free and
* we don't know if container is running or completed.
*/
private Set<String> allocated = new HashSet<String>();
/** Containers which are currently running */
private Set<String> running = new HashSet<String>();
/** Containers which has been completed */
private Set<String> completed = new HashSet<String>();
/** Containers which has been completed with failed status */
private Set<String> failed = new HashSet<String>();
/** Lock for sets updates */
private final Object lock = new Object();
@Override
public void onContainer(List<Container> containers) {
for (Container container : containers) {
handleContainer(container);
}
}
@Override
public void onContainerStatus(List<ContainerStatus> containerStatuses) {
handleContainerStatus(containerStatuses, false);
}
@Override
public int freeCount() {
return allocated.size();
}
@Override
public int runningCount() {
return running.size();
}
@Override
public int failedCount() {
return failed.size();
}
@Override
public int completedCount() {
return completed.size();
}
private void handleContainer(Container container) {
if (log.isDebugEnabled()) {
log.debug("Reporting container=" + container);
}
String cid = ConverterUtils.toString(container.getId());
synchronized (lock) {
if (allocated.contains(cid)) {
running.add(cid);
allocated.remove(cid);
} else {
allocated.add(cid);
}
}
if (log.isDebugEnabled()) {
log.debug("State after reportContainer: " + toDebugString());
}
}
private void handleContainerStatus(List<ContainerStatus> containerStatuses, boolean notifyIntermediates) {
for (ContainerStatus status : containerStatuses) {
if (log.isDebugEnabled()) {
log.debug("Reporting containerStatus=" + status);
}
ContainerId containerId = status.getContainerId();
int exitStatus = status.getExitStatus();
ContainerState state = status.getState();
String cid = ConverterUtils.toString(containerId);
synchronized (lock) {
if (state.equals(ContainerState.COMPLETE)) {
if (exitStatus > 0 || exitStatus == -100 || exitStatus == -101 || exitStatus == -1000) {
failed.add(cid);
} else if (exitStatus != -100) {
// TODO: should do something centrally about exit statuses
// -100 - container released by app
completed.add(cid);
}
}
allocated.remove(cid);
running.remove(cid);
if (notifyIntermediates) {
dispatchCurrentContainerMonitorState();
}
}
}
if (!notifyIntermediates) {
synchronized (lock) {
dispatchCurrentContainerMonitorState();
}
}
if (log.isDebugEnabled()) {
log.debug("State after handleContainerStatus: " + toDebugString());
}
}
/**
* Dispatches current {@link ContainerMonitorState} into event listener.
*/
private void dispatchCurrentContainerMonitorState() {
notifyState(new ContainerMonitorState(allocated.size(), running.size(), completed.size(), failed.size()));
}
/**
* Gets this class description as a debug string.
*
* @return class description as a debug string
*/
public String toDebugString() {
return "DefaultContainerMonitor [allocated=" + toDebugStringContainerSet(allocated) + ", running="
+ toDebugStringContainerSet(running) + ", completed=" + toDebugStringContainerSet(completed)
+ ", failed=" + toDebugStringContainerSet(failed) + "]";
}
/**
* Helper method to debug content of sets in this class.
*
* @param set the set used in this class
* @return Set as debug string
*/
private String toDebugStringContainerSet(Set<String> set) {
StringBuilder buf = new StringBuilder();
buf.append('[');
buf.append(StringUtils.collectionToCommaDelimitedString(set));
buf.append(']');
return buf.toString();
}
}