/*
* Copyright 2010 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.gradle.execution.taskgraph;
import groovy.lang.Closure;
import org.gradle.api.Task;
import org.gradle.api.execution.TaskExecutionGraphListener;
import org.gradle.api.execution.TaskExecutionListener;
import org.gradle.api.specs.Spec;
import org.gradle.execution.TaskFailureHandler;
import org.gradle.execution.TaskGraphExecuter;
import org.gradle.initialization.BuildCancellationToken;
import org.gradle.listener.ClosureBackedMethodInvocationDispatch;
import org.gradle.listener.ListenerBroadcast;
import org.gradle.listener.ListenerManager;
import org.gradle.util.Clock;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Set;
public class DefaultTaskGraphExecuter implements TaskGraphExecuter {
private static Logger logger = LoggerFactory.getLogger(DefaultTaskGraphExecuter.class);
private enum TaskGraphState {
EMPTY, DIRTY, POPULATED
}
private final TaskPlanExecutor taskPlanExecutor;
private final ListenerBroadcast<TaskExecutionGraphListener> graphListeners;
private final ListenerBroadcast<TaskExecutionListener> taskListeners;
private final DefaultTaskExecutionPlan taskExecutionPlan;
private TaskGraphState taskGraphState = TaskGraphState.EMPTY;
public DefaultTaskGraphExecuter(ListenerManager listenerManager, TaskPlanExecutor taskPlanExecutor, BuildCancellationToken cancellationToken) {
this.taskPlanExecutor = taskPlanExecutor;
graphListeners = listenerManager.createAnonymousBroadcaster(TaskExecutionGraphListener.class);
taskListeners = listenerManager.createAnonymousBroadcaster(TaskExecutionListener.class);
taskExecutionPlan = new DefaultTaskExecutionPlan(cancellationToken);
}
public void useFailureHandler(TaskFailureHandler handler) {
taskExecutionPlan.useFailureHandler(handler);
}
public void useFilter(Spec<? super Task> filter) {
taskExecutionPlan.useFilter(filter);
taskGraphState = TaskGraphState.DIRTY;
}
public void addTasks(Iterable<? extends Task> tasks) {
assert tasks != null;
Clock clock = new Clock();
Set<Task> taskSet = new LinkedHashSet<Task>();
for (Task task : tasks) {
taskSet.add(task);
}
taskExecutionPlan.addToTaskGraph(taskSet);
taskGraphState = TaskGraphState.DIRTY;
logger.debug("Timing: Creating the DAG took " + clock.getTime());
}
public void execute() {
Clock clock = new Clock();
ensurePopulated();
graphListeners.getSource().graphPopulated(this);
try {
taskPlanExecutor.process(taskExecutionPlan, taskListeners.getSource());
logger.debug("Timing: Executing the DAG took " + clock.getTime());
} finally {
taskExecutionPlan.clear();
}
}
public void addTaskExecutionGraphListener(TaskExecutionGraphListener listener) {
graphListeners.add(listener);
}
public void removeTaskExecutionGraphListener(TaskExecutionGraphListener listener) {
graphListeners.remove(listener);
}
public void whenReady(final Closure closure) {
graphListeners.add(new ClosureBackedMethodInvocationDispatch("graphPopulated", closure));
}
public void addTaskExecutionListener(TaskExecutionListener listener) {
taskListeners.add(listener);
}
public void removeTaskExecutionListener(TaskExecutionListener listener) {
taskListeners.remove(listener);
}
public void beforeTask(final Closure closure) {
taskListeners.add(new ClosureBackedMethodInvocationDispatch("beforeExecute", closure));
}
public void afterTask(final Closure closure) {
taskListeners.add(new ClosureBackedMethodInvocationDispatch("afterExecute", closure));
}
public boolean hasTask(Task task) {
ensurePopulated();
return taskExecutionPlan.getTasks().contains(task);
}
public boolean hasTask(String path) {
ensurePopulated();
assert path != null && path.length() > 0;
for (Task task : taskExecutionPlan.getTasks()) {
if (task.getPath().equals(path)) {
return true;
}
}
return false;
}
public List<Task> getAllTasks() {
ensurePopulated();
return taskExecutionPlan.getTasks();
}
private void ensurePopulated() {
switch (taskGraphState) {
case EMPTY:
throw new IllegalStateException(
"Task information is not available, as this task execution graph has not been populated.");
case DIRTY:
taskExecutionPlan.determineExecutionPlan();
taskGraphState = TaskGraphState.POPULATED;
return;
case POPULATED:
}
}
}