--- /dev/null
+package org.apache.lucene.util;
+
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You 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.
+ */
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+import org.apache.lucene.util.TwoPhaseCommitTool.TwoPhaseCommitWrapper;
+
+public class TestTwoPhaseCommitTool extends LuceneTestCase {
+
+ private static class TwoPhaseCommitImpl implements TwoPhaseCommit {
+ static boolean commitCalled = false;
+ final boolean failOnPrepare;
+ final boolean failOnCommit;
+ final boolean failOnRollback;
+ boolean rollbackCalled = false;
+ Map<String, String> prepareCommitData = null;
+ Map<String, String> commitData = null;
+
+ public TwoPhaseCommitImpl(boolean failOnPrepare, boolean failOnCommit, boolean failOnRollback) {
+ this.failOnPrepare = failOnPrepare;
+ this.failOnCommit = failOnCommit;
+ this.failOnRollback = failOnRollback;
+ }
+
+ public void prepareCommit() throws IOException {
+ prepareCommit(null);
+ }
+
+ public void prepareCommit(Map<String, String> commitData) throws IOException {
+ this.prepareCommitData = commitData;
+ assertFalse("commit should not have been called before all prepareCommit were", commitCalled);
+ if (failOnPrepare) {
+ throw new IOException("failOnPrepare");
+ }
+ }
+
+ public void commit() throws IOException {
+ commit(null);
+ }
+
+ public void commit(Map<String, String> commitData) throws IOException {
+ this.commitData = commitData;
+ commitCalled = true;
+ if (failOnCommit) {
+ throw new RuntimeException("failOnCommit");
+ }
+ }
+
+ public void rollback() throws IOException {
+ rollbackCalled = true;
+ if (failOnRollback) {
+ throw new Error("failOnRollback");
+ }
+ }
+ }
+
+ @Override
+ public void setUp() throws Exception {
+ super.setUp();
+ TwoPhaseCommitImpl.commitCalled = false; // reset count before every test
+ }
+
+ public void testPrepareThenCommit() throws Exception {
+ // tests that prepareCommit() is called on all objects before commit()
+ TwoPhaseCommitImpl[] objects = new TwoPhaseCommitImpl[2];
+ for (int i = 0; i < objects.length; i++) {
+ objects[i] = new TwoPhaseCommitImpl(false, false, false);
+ }
+
+ // following call will fail if commit() is called before all prepare() were
+ TwoPhaseCommitTool.execute(objects);
+ }
+
+ public void testRollback() throws Exception {
+ // tests that rollback is called if failure occurs at any stage
+ int numObjects = random.nextInt(8) + 3; // between [3, 10]
+ TwoPhaseCommitImpl[] objects = new TwoPhaseCommitImpl[numObjects];
+ for (int i = 0; i < objects.length; i++) {
+ boolean failOnPrepare = random.nextBoolean();
+ // we should not hit failures on commit usually
+ boolean failOnCommit = random.nextDouble() < 0.05;
+ boolean railOnRollback = random.nextBoolean();
+ objects[i] = new TwoPhaseCommitImpl(failOnPrepare, failOnCommit, railOnRollback);
+ }
+
+ boolean anyFailure = false;
+ try {
+ TwoPhaseCommitTool.execute(objects);
+ } catch (Throwable t) {
+ anyFailure = true;
+ }
+
+ if (anyFailure) {
+ // if any failure happened, ensure that rollback was called on all.
+ for (TwoPhaseCommitImpl tpc : objects) {
+ assertTrue("rollback was not called while a failure occurred during the 2-phase commit", tpc.rollbackCalled);
+ }
+ }
+ }
+
+ public void testWrapper() throws Exception {
+ // tests that TwoPhaseCommitWrapper delegates prepare/commit w/ commitData
+ TwoPhaseCommitImpl impl = new TwoPhaseCommitImpl(false, false, false);
+ HashMap<String, String> commitData = new HashMap<String, String>();
+ TwoPhaseCommitWrapper wrapper = new TwoPhaseCommitWrapper(impl, commitData);
+
+ wrapper.prepareCommit();
+ assertSame(commitData, impl.prepareCommitData);
+
+ // wrapper should ignore passed commitData
+ wrapper.prepareCommit(new HashMap<String, String>());
+ assertSame(commitData, impl.prepareCommitData);
+
+ wrapper.commit();
+ assertSame(commitData, impl.commitData);
+
+ // wrapper should ignore passed commitData
+ wrapper.commit(new HashMap<String, String>());
+ assertSame(commitData, impl.commitData);
+ }
+
+ public void testNullTPCs() throws Exception {
+ int numObjects = random.nextInt(4) + 3; // between [3, 6]
+ TwoPhaseCommit[] tpcs = new TwoPhaseCommit[numObjects];
+ boolean setNull = false;
+ for (int i = 0; i < tpcs.length; i++) {
+ boolean isNull = random.nextDouble() < 0.3;
+ if (isNull) {
+ setNull = true;
+ tpcs[i] = null;
+ } else {
+ tpcs[i] = new TwoPhaseCommitImpl(false, false, false);
+ }
+ }
+
+ if (!setNull) {
+ // none of the TPCs were picked to be null, pick one at random
+ int idx = random.nextInt(numObjects);
+ tpcs[idx] = null;
+ }
+
+ // following call would fail if TPCTool won't handle null TPCs properly
+ TwoPhaseCommitTool.execute(tpcs);
+ }
+
+}
fnp / pylucene.git / blobdiff