/*
* Copyright 2016 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.changedetection.rules;
import com.google.common.collect.ImmutableList;
import com.google.common.hash.HashCode;
import org.gradle.api.Nullable;
import org.gradle.api.internal.TaskInternal;
import org.gradle.api.internal.changedetection.state.ImplementationSnapshot;
import org.gradle.api.internal.changedetection.state.TaskExecution;
import org.gradle.api.internal.tasks.ContextAwareTaskAction;
import org.gradle.internal.classloader.ClassLoaderHierarchyHasher;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.Collection;
import java.util.List;
class TaskTypeTaskStateChanges extends SimpleTaskStateChanges {
private static final Logger LOGGER = LoggerFactory.getLogger(TaskTypeTaskStateChanges.class);
private final String taskPath;
private final ImplementationSnapshot taskImplementation;
private final ImmutableList<ImplementationSnapshot> taskActionImplementations;
private final TaskExecution previousExecution;
public TaskTypeTaskStateChanges(@Nullable TaskExecution previousExecution, TaskExecution currentExecution, String taskPath, Class<? extends TaskInternal> taskClass, Collection<ContextAwareTaskAction> taskActions, ClassLoaderHierarchyHasher classLoaderHierarchyHasher) {
ImplementationSnapshot taskImplementation = new ImplementationSnapshot(taskClass.getName(), classLoaderHierarchyHasher.getClassLoaderHash(taskClass.getClassLoader()));
ImmutableList<ImplementationSnapshot> taskActionImplementations = collectActionImplementations(taskActions, classLoaderHierarchyHasher);
currentExecution.setTaskImplementation(taskImplementation);
currentExecution.setTaskActionImplementations(taskActionImplementations);
if (LOGGER.isDebugEnabled()) {
LOGGER.debug("Task {} implementation: {}", taskPath, taskImplementation);
LOGGER.debug("Task {} action implementations: {}", taskPath, taskActionImplementations);
}
this.taskPath = taskPath;
this.taskImplementation = taskImplementation;
this.taskActionImplementations = taskActionImplementations;
this.previousExecution = previousExecution;
}
private ImmutableList<ImplementationSnapshot> collectActionImplementations(Collection<ContextAwareTaskAction> taskActions, ClassLoaderHierarchyHasher classLoaderHierarchyHasher) {
if (taskActions.isEmpty()) {
return ImmutableList.of();
}
ImmutableList.Builder<ImplementationSnapshot> actionImpls = ImmutableList.builder();
for (ContextAwareTaskAction taskAction : taskActions) {
String typeName = taskAction.getActionClassName();
HashCode classLoaderHash = classLoaderHierarchyHasher.getClassLoaderHash(taskAction.getClassLoader());
actionImpls.add(new ImplementationSnapshot(typeName, classLoaderHash));
}
return actionImpls.build();
}
@Override
protected void addAllChanges(List<TaskStateChange> changes) {
ImplementationSnapshot prevImplementation = previousExecution.getTaskImplementation();
if (!taskImplementation.getTypeName().equals(prevImplementation.getTypeName())) {
changes.add(new DescriptiveChange("Task '%s' has changed type from '%s' to '%s'.",
taskPath, prevImplementation.getTypeName(), taskImplementation.getTypeName()));
return;
}
if (taskImplementation.hasUnknownClassLoader()) {
changes.add(new DescriptiveChange("Task '%s' was loaded with an unknown classloader", taskPath));
return;
}
if (prevImplementation.hasUnknownClassLoader()) {
changes.add(new DescriptiveChange("Task '%s' was loaded with an unknown classloader during the previous execution", taskPath));
return;
}
if (!taskImplementation.getClassLoaderHash().equals(prevImplementation.getClassLoaderHash())) {
changes.add(new DescriptiveChange("Task '%s' class path has changed from %s to %s.", taskPath, prevImplementation.getClassLoaderHash(), taskImplementation.getClassLoaderHash()));
return;
}
if (hasAnyUnknownClassLoader(taskActionImplementations)) {
changes.add(new DescriptiveChange("Task '%s' has an additional action that was loaded with an unknown classloader", taskPath));
return;
}
if (hasAnyUnknownClassLoader(previousExecution.getTaskActionImplementations())) {
changes.add(new DescriptiveChange("Task '%s' had an additional action that was loaded with an unknown classloader during the previous execution", taskPath));
return;
}
if (!taskActionImplementations.equals(previousExecution.getTaskActionImplementations())) {
changes.add(new DescriptiveChange("Task '%s' has additional actions that have changed", taskPath));
}
}
private static boolean hasAnyUnknownClassLoader(Iterable<ImplementationSnapshot> implementations) {
for (ImplementationSnapshot implementation : implementations) {
if (implementation.hasUnknownClassLoader()) {
return true;
}
}
return false;
}
}