/*
* 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 com.google.common.collect.Sets;
import groovy.lang.Closure;
import org.gradle.api.Action;
import org.gradle.api.Task;
import org.gradle.api.execution.TaskExecutionAdapter;
import org.gradle.api.execution.TaskExecutionGraph;
import org.gradle.api.execution.TaskExecutionGraphListener;
import org.gradle.api.execution.TaskExecutionListener;
import org.gradle.api.execution.internal.ExecuteTaskBuildOperationDetails;
import org.gradle.api.execution.internal.InternalTaskExecutionListener;
import org.gradle.api.execution.internal.TaskOperationInternal;
import org.gradle.api.internal.TaskInternal;
import org.gradle.api.internal.tasks.TaskExecuter;
import org.gradle.api.internal.tasks.TaskStateInternal;
import org.gradle.api.internal.tasks.execution.DefaultTaskExecutionContext;
import org.gradle.api.specs.Spec;
import org.gradle.api.specs.Specs;
import org.gradle.api.tasks.TaskState;
import org.gradle.execution.TaskFailureHandler;
import org.gradle.execution.TaskGraphExecuter;
import org.gradle.initialization.BuildCancellationToken;
import org.gradle.internal.Factory;
import org.gradle.internal.event.ListenerBroadcast;
import org.gradle.internal.event.ListenerManager;
import org.gradle.internal.operations.BuildOperationContext;
import org.gradle.internal.operations.BuildOperationExecutor;
import org.gradle.internal.operations.RunnableBuildOperation;
import org.gradle.internal.progress.BuildOperationDescriptor;
import org.gradle.internal.progress.BuildOperationState;
import org.gradle.internal.progress.BuildOperationCategory;
import org.gradle.internal.progress.OperationFinishEvent;
import org.gradle.internal.progress.OperationStartEvent;
import org.gradle.internal.resources.ResourceLockCoordinationService;
import org.gradle.internal.time.Timer;
import org.gradle.internal.time.Timers;
import org.gradle.internal.work.WorkerLeaseService;
import org.gradle.listener.ClosureBackedMethodInvocationDispatch;
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 final Logger LOGGER = LoggerFactory.getLogger(DefaultTaskGraphExecuter.class);
private enum TaskGraphState {
EMPTY, DIRTY, POPULATED
}
private final TaskPlanExecutor taskPlanExecutor;
// This currently needs to be lazy, as it uses state that is not available when the graph is created
private final Factory<? extends TaskExecuter> taskExecuter;
private final ListenerBroadcast<TaskExecutionGraphListener> graphListeners;
private final ListenerBroadcast<TaskExecutionListener> taskListeners;
private final InternalTaskExecutionListener internalTaskListener;
private final DefaultTaskExecutionPlan taskExecutionPlan;
private final BuildOperationExecutor buildOperationExecutor;
private TaskGraphState taskGraphState = TaskGraphState.EMPTY;
private final Set<Task> requestedTasks = Sets.newTreeSet();
private Spec<? super Task> filter = Specs.SATISFIES_ALL;
public DefaultTaskGraphExecuter(ListenerManager listenerManager, TaskPlanExecutor taskPlanExecutor, Factory<? extends TaskExecuter> taskExecuter, BuildCancellationToken cancellationToken, BuildOperationExecutor buildOperationExecutor, WorkerLeaseService workerLeaseService, ResourceLockCoordinationService coordinationService) {
this.taskPlanExecutor = taskPlanExecutor;
this.taskExecuter = taskExecuter;
this.buildOperationExecutor = buildOperationExecutor;
graphListeners = listenerManager.createAnonymousBroadcaster(TaskExecutionGraphListener.class);
taskListeners = listenerManager.createAnonymousBroadcaster(TaskExecutionListener.class);
internalTaskListener = listenerManager.getBroadcaster(InternalTaskExecutionListener.class);
taskExecutionPlan = new DefaultTaskExecutionPlan(cancellationToken, coordinationService, workerLeaseService);
}
public void useFailureHandler(TaskFailureHandler handler) {
taskExecutionPlan.useFailureHandler(handler);
}
public void useFilter(Spec<? super Task> filter) {
this.filter = (Spec<? super Task>) (filter != null ? filter : Specs.SATISFIES_ALL);
taskExecutionPlan.useFilter(this.filter);
taskGraphState = TaskGraphState.DIRTY;
}
public void addTasks(Iterable<? extends Task> tasks) {
assert tasks != null;
final Timer clock = Timers.startTimer();
Set<Task> taskSet = new LinkedHashSet<Task>();
for (Task task : tasks) {
taskSet.add(task);
requestedTasks.add(task);
}
taskExecutionPlan.addToTaskGraph(taskSet);
taskGraphState = TaskGraphState.DIRTY;
LOGGER.debug("Timing: Creating the DAG took " + clock.getElapsed());
}
public void execute() {
Timer clock = Timers.startTimer();
ensurePopulated();
graphListeners.getSource().graphPopulated(this);
try {
taskPlanExecutor.process(taskExecutionPlan, new EventFiringTaskWorker(taskExecuter.create(), buildOperationExecutor.getCurrentOperation()));
LOGGER.debug("Timing: Executing the DAG took " + clock.getElapsed());
} 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 whenReady(final Action<TaskExecutionGraph> action) {
graphListeners.add(new TaskExecutionGraphListener() {
@Override
public void graphPopulated(TaskExecutionGraph graph) {
action.execute(graph);
}
});
}
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 beforeTask(final Action<Task> action) {
taskListeners.add(new TaskExecutionAdapter() {
@Override
public void beforeExecute(Task task) {
action.execute(task);
}
});
}
public void afterTask(final Closure closure) {
taskListeners.add(new ClosureBackedMethodInvocationDispatch("afterExecute", closure));
}
public void afterTask(final Action<Task> action) {
taskListeners.add(new TaskExecutionAdapter() {
@Override
public void afterExecute(Task task, TaskState state) {
action.execute(task);
}
});
}
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:
}
}
/**
* This action will set the start and end times on the internal task state, and will make sure
* that when a task is started, the public listeners are executed after the internal listeners
* are executed and when a task is finished, the public listeners are executed before the internal
* listeners are executed. Basically the internal listeners embrace the public listeners.
*/
private class EventFiringTaskWorker implements Action<TaskInternal> {
private final TaskExecuter taskExecuter;
private final BuildOperationState parentOperation;
EventFiringTaskWorker(TaskExecuter taskExecuter, BuildOperationState parentOperation) {
this.taskExecuter = taskExecuter;
this.parentOperation = parentOperation;
}
@Override
public void execute(final TaskInternal task) {
buildOperationExecutor.run(new RunnableBuildOperation() {
@Override
public void run(BuildOperationContext context) {
final Object taskExecutionOperationId = buildOperationExecutor.getCurrentOperation().getId();
// These events are used by build scans
TaskOperationInternal legacyOperation = new TaskOperationInternal(task, taskExecutionOperationId);
internalTaskListener.beforeExecute(legacyOperation, new OperationStartEvent(0));
TaskStateInternal state = task.getState();
taskListeners.getSource().beforeExecute(task);
taskExecuter.execute(task, state, new DefaultTaskExecutionContext());
taskListeners.getSource().afterExecute(task, state);
context.failed(state.getFailure());
internalTaskListener.afterExecute(legacyOperation, new OperationFinishEvent(0, 0, state.getFailure(), null));
}
@Override
public BuildOperationDescriptor.Builder description() {
ExecuteTaskBuildOperationDetails taskOperation = new ExecuteTaskBuildOperationDetails(task);
return BuildOperationDescriptor.displayName("Task " + task.getIdentityPath())
.name(task.getIdentityPath().toString())
.parent(parentOperation)
.operationType(BuildOperationCategory.TASK)
.details(taskOperation);
}
});
}
}
public Set<Task> getRequestedTasks() {
return requestedTasks;
}
public Set<Task> getFilteredTasks() {
/*
Note: we currently extract this information from the execution plan because it's
buried under functions in #filter. This could be detangled/simplified by introducing
excludeTasks(Iterable<Task>) as an analog to addTasks(Iterable<Task>).
This is too drastic a change for the stage in the release cycle were exposing this information
was necessary, therefore the minimal change solution was implemented.
*/
return taskExecutionPlan.getFilteredTasks();
}
}