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// Copyright 2015 The Bazel Authors. All rights reserved.
//
// 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 com.google.devtools.build.lib.actions;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Sets;
import com.google.devtools.build.lib.actions.MutableActionGraph.ActionConflictException;
import com.google.devtools.build.lib.actions.util.ActionsTestUtil.UncheckedActionConflictException;
import com.google.devtools.build.lib.actions.util.TestAction;
import com.google.devtools.build.lib.concurrent.AbstractQueueVisitor;
import com.google.devtools.build.lib.concurrent.ErrorClassifier;
import com.google.devtools.build.lib.vfs.FileSystem;
import com.google.devtools.build.lib.vfs.Path;
import com.google.devtools.build.lib.vfs.inmemoryfs.InMemoryFileSystem;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests for {@link MapBasedActionGraph}.
*/
@RunWith(JUnit4.class)
public class MapBasedActionGraphTest {
private final FileSystem fileSystem = new InMemoryFileSystem();
private final ActionKeyContext actionKeyContext = new ActionKeyContext();
@Test
public void testSmoke() throws Exception {
MutableActionGraph actionGraph = new MapBasedActionGraph(actionKeyContext);
Path execRoot = fileSystem.getPath("/");
Path root = fileSystem.getPath("/root");
Path path = root.getRelative("foo");
Artifact output = new Artifact(path, ArtifactRoot.asDerivedRoot(execRoot, root));
Action action = new TestAction(TestAction.NO_EFFECT,
ImmutableSet.<Artifact>of(), ImmutableSet.of(output));
actionGraph.registerAction(action);
actionGraph.unregisterAction(action);
path = root.getRelative("bar");
output = new Artifact(path, ArtifactRoot.asDerivedRoot(execRoot, root));
Action action2 = new TestAction(TestAction.NO_EFFECT,
ImmutableSet.<Artifact>of(), ImmutableSet.of(output));
actionGraph.registerAction(action);
actionGraph.registerAction(action2);
actionGraph.unregisterAction(action);
}
@Test
public void testNoActionConflictWhenUnregisteringSharedAction() throws Exception {
MutableActionGraph actionGraph = new MapBasedActionGraph(actionKeyContext);
Path execRoot = fileSystem.getPath("/");
Path root = fileSystem.getPath("/root");
Path path = root.getRelative("/root/foo");
Artifact output = new Artifact(path, ArtifactRoot.asDerivedRoot(execRoot, root));
Action action = new TestAction(TestAction.NO_EFFECT,
ImmutableSet.<Artifact>of(), ImmutableSet.of(output));
actionGraph.registerAction(action);
Action otherAction = new TestAction(TestAction.NO_EFFECT,
ImmutableSet.<Artifact>of(), ImmutableSet.of(output));
actionGraph.registerAction(otherAction);
actionGraph.unregisterAction(action);
}
private class ActionRegisterer extends AbstractQueueVisitor {
private final MutableActionGraph graph = new MapBasedActionGraph(new ActionKeyContext());
private final Artifact output;
// Just to occasionally add actions that were already present.
private final Set<Action> allActions = Sets.newConcurrentHashSet();
private final AtomicInteger actionCount = new AtomicInteger(0);
private ActionRegisterer() {
super(
200,
1,
TimeUnit.SECONDS,
/*failFastOnException=*/ true,
"action-graph-test",
ErrorClassifier.DEFAULT);
Path execRoot = fileSystem.getPath("/");
Path root = fileSystem.getPath("/root");
Path path = root.getRelative("foo");
output = new Artifact(path, ArtifactRoot.asDerivedRoot(execRoot, root));
allActions.add(new TestAction(
TestAction.NO_EFFECT, ImmutableSet.<Artifact>of(), ImmutableSet.of(output)));
}
private void registerAction(final Action action) {
execute(
new Runnable() {
@Override
public void run() {
try {
graph.registerAction(action);
} catch (ActionConflictException e) {
throw new UncheckedActionConflictException(e);
}
doRandom();
}
});
}
private void unregisterAction(final Action action) {
execute(
new Runnable() {
@Override
public void run() {
graph.unregisterAction(action);
doRandom();
}
});
}
private void doRandom() {
if (actionCount.incrementAndGet() > 10000) {
return;
}
Action action = null;
if (Math.random() < 0.5) {
action = Iterables.getFirst(allActions, null);
} else {
action = new TestAction(
TestAction.NO_EFFECT, ImmutableSet.<Artifact>of(), ImmutableSet.of(output));
allActions.add(action);
}
if (Math.random() < 0.5) {
registerAction(action);
} else {
unregisterAction(action);
}
}
private void work() throws InterruptedException {
awaitQuiescence(/*interruptWorkers=*/ true);
}
}
@Test
public void testSharedActionStressTest() throws Exception {
ActionRegisterer actionRegisterer = new ActionRegisterer();
actionRegisterer.doRandom();
actionRegisterer.work();
}
}
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