/*
* 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.api.internal.tasks.execution;
import org.gradle.api.internal.TaskInternal;
import org.gradle.api.internal.changedetection.TaskArtifactState;
import org.gradle.api.internal.changedetection.TaskArtifactStateRepository;
import org.gradle.api.internal.tasks.TaskExecuter;
import org.gradle.api.internal.tasks.TaskExecutionContext;
import org.gradle.api.internal.tasks.TaskStateInternal;
import org.gradle.util.Clock;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.Formatter;
import java.util.List;
/**
* A {@link TaskExecuter} which skips tasks whose outputs are up-to-date.
*/
public class SkipUpToDateTaskExecuter implements TaskExecuter {
private static final Logger LOGGER = LoggerFactory.getLogger(SkipUpToDateTaskExecuter.class);
private final TaskExecuter executer;
private final TaskArtifactStateRepository repository;
public SkipUpToDateTaskExecuter(TaskArtifactStateRepository repository, TaskExecuter executer) {
this.executer = executer;
this.repository = repository;
}
public void execute(TaskInternal task, TaskStateInternal state, TaskExecutionContext context) {
LOGGER.debug("Determining if {} is up-to-date", task);
Clock clock = new Clock();
TaskArtifactState taskArtifactState = repository.getStateFor(task);
try {
List<String> messages = new ArrayList<String>();
if (taskArtifactState.isUpToDate(messages)) {
LOGGER.info("Skipping {} as it is up-to-date (took {}).", task, clock.getTime());
state.upToDate();
return;
}
logOutOfDateMessages(messages, task, clock.getTime());
task.getOutputs().setHistory(taskArtifactState.getExecutionHistory());
context.setTaskArtifactState(taskArtifactState);
taskArtifactState.beforeTask();
try {
executer.execute(task, state, context);
if (state.getFailure() == null) {
taskArtifactState.afterTask();
}
} finally {
task.getOutputs().setHistory(null);
context.setTaskArtifactState(null);
}
} finally {
taskArtifactState.finished();
}
}
private void logOutOfDateMessages(List<String> messages, TaskInternal task, String took) {
if (LOGGER.isInfoEnabled()) {
Formatter formatter = new Formatter();
formatter.format("Executing %s (up-to-date check took %s) due to:", task, took);
for (String message : messages) {
formatter.format("%n %s", message);
}
LOGGER.info(formatter.toString());
}
}
}