/*
* 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.configuration.project;
import org.gradle.api.Action;
import org.gradle.api.ProjectConfigurationException;
import org.gradle.api.ProjectEvaluationListener;
import org.gradle.api.internal.project.ProjectInternal;
import org.gradle.api.internal.project.ProjectStateInternal;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Manages lifecycle concerns while delegating actual evaluation to another evaluator
*
* @see org.gradle.internal.service.scopes.BuildScopeServices#createProjectEvaluator()
*/
public class LifecycleProjectEvaluator implements ProjectEvaluator {
private static final Logger LOGGER = LoggerFactory.getLogger(LifecycleProjectEvaluator.class);
private final ProjectEvaluator delegate;
private final Action<? super ProjectInternal> projectFinalizer;
public LifecycleProjectEvaluator(ProjectEvaluator delegate, Action<? super ProjectInternal> projectFinalizer) {
this.delegate = delegate;
this.projectFinalizer = projectFinalizer;
}
public void evaluate(ProjectInternal project, ProjectStateInternal state) {
//TODO this is one of the places to look into thread safety when we implement parallel configuration
if (state.getExecuted() || state.getExecuting()) {
return;
}
ProjectEvaluationListener listener = project.getProjectEvaluationBroadcaster();
try {
listener.beforeEvaluate(project);
} catch (Exception e) {
addConfigurationFailure(project, state, e);
return;
}
state.setExecuting(true);
try {
delegate.evaluate(project, state);
} catch (Exception e) {
addConfigurationFailure(project, state, e);
} finally {
state.setExecuting(false);
state.executed();
notifyAfterEvaluate(listener, project, state);
}
if (!state.hasFailure()) {
try {
projectFinalizer.execute(project);
} catch (Exception e) {
addConfigurationFailure(project, state, e);
}
}
}
private void notifyAfterEvaluate(ProjectEvaluationListener listener, ProjectInternal project, ProjectStateInternal state) {
try {
listener.afterEvaluate(project, state);
} catch (Exception e) {
if (state.hasFailure()) {
// Just log this failure, and pass the existing failure out in the project state
LOGGER.error("Failed to notify ProjectEvaluationListener.afterEvaluate(), but primary configuration failure takes precedence.", e);
return;
}
addConfigurationFailure(project, state, e);
}
}
private void addConfigurationFailure(ProjectInternal project, ProjectStateInternal state, Exception e) {
ProjectConfigurationException failure = new ProjectConfigurationException(String.format("A problem occurred configuring %s.", project), e);
state.executed(failure);
}
}