/*
* (C) Copyright 2012-2015 Nuxeo SA (http://nuxeo.com/) and others.
*
* 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.
*
* Contributors:
* Florent Guillaume
* Benoit Delbosc
*/
package org.nuxeo.ecm.core.work;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import org.nuxeo.ecm.core.work.api.Work;
import org.nuxeo.ecm.core.work.api.Work.State;
import org.nuxeo.ecm.core.work.api.WorkQueueDescriptor;
import org.nuxeo.ecm.core.work.api.WorkQueueMetrics;
/**
* Implementation of a {@link WorkQueuing} using in-memory queuing.
*
* @since 5.8
*/
public class MemoryWorkQueuing implements WorkQueuing {
protected final Map<String, MemoryBlockingQueue> allQueued = new HashMap<>();
protected Listener listener;
public MemoryWorkQueuing(Listener listener) {
this.listener = listener;
}
@Override
public MemoryBlockingQueue init(WorkQueueDescriptor config) {
int capacity = config.getCapacity();
if (capacity <= 0) {
capacity = -1; // unbounded
}
MemoryBlockingQueue queue = new MemoryBlockingQueue(config.id, this, capacity);
allQueued.put(queue.queueId, queue);
return queue;
}
@Override
public MemoryBlockingQueue getQueue(String queueId) {
return allQueued.get(queueId);
}
@Override
public void workSchedule(String queueId, Work work) {
listener.queueChanged(work, getQueue(queueId).workSchedule(work));
}
@Override
public void workCanceled(String queueId, Work work) {
listener.queueChanged(work, getQueue(queueId).workCanceled(work));
}
@Override
public void workRunning(String queueId, Work work) {
listener.queueChanged(work, getQueue(queueId).workRunning(work));
}
@Override
public void workCompleted(String queueId, Work work) {
listener.queueChanged(work, getQueue(queueId).workCompleted(work));
}
@Override
public void workReschedule(String queueId, Work work) {
listener.queueChanged(work, getQueue(queueId).workRescheduleRunning(work));
}
Optional<Work> lookup(String workId) {
return allQueued.values()
.stream()
.map(queue -> queue.lookup(workId))
.filter(work -> work != null)
.findAny();
}
@Override
public Work find(String workId, State state) {
return lookup(workId)
.filter(work -> work.getWorkInstanceState() == state)
.orElse(null);
}
@Override
public boolean isWorkInState(String workId, State state) {
Optional<Work> option = lookup(workId);
if (!option.isPresent()) {
return false;
}
if (state == null) {
return true;
}
return option.get()
.getWorkInstanceState()
.equals(state);
}
@Override
public State getWorkState(String workId) {
return lookup(workId).map(Work::getWorkInstanceState)
.orElse(null);
}
@Override
public List<Work> listWork(String queueId, State state) {
MemoryBlockingQueue queue = getQueue(queueId);
if (state == null) {
return queue.list();
}
switch (state) {
case SCHEDULED:
return queue.listScheduled();
case RUNNING:
return queue.listRunning();
default:
throw new IllegalArgumentException(String.valueOf(state));
}
}
@Override
public List<String> listWorkIds(String queueId, State state) {
MemoryBlockingQueue queue = getQueue(queueId);
if (state == null) {
return queue.keys();
}
switch (state) {
case SCHEDULED:
return queue.scheduledKeys();
case RUNNING:
return queue.runningKeys();
default:
throw new IllegalArgumentException(String.valueOf(state));
}
}
@Override
public long count(String queueId, State state) {
switch (state) {
case SCHEDULED:
return metrics(queueId).scheduled.longValue();
case RUNNING:
return metrics(queueId).running.longValue();
default:
throw new IllegalArgumentException(String.valueOf(state));
}
}
@Override
public synchronized void removeScheduled(String queueId, String workId) {
final MemoryBlockingQueue queue = getQueue(queueId);
Work work = queue.lookup(workId);
if (work == null) {
return;
}
work.setWorkInstanceState(State.UNKNOWN);
listener.queueChanged(work, queue.workCanceled(work));
}
@Override
public void setActive(String queueId, boolean value) {
WorkQueueMetrics metrics = getQueue(queueId).setActive(value);
if (value) {
listener.queueActivated(metrics);
} else {
listener.queueDeactivated(metrics);
}
}
@Override
public void listen(Listener listener) {
this.listener = listener;
}
@Override
public WorkQueueMetrics metrics(String queueId) {
return getQueue(queueId).metrics();
}
}