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* this work for additional information regarding copyright
* ownership. Elasticsearch 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.
*/
package org.elasticsearch.action;
import org.elasticsearch.common.CheckedConsumer;
import org.elasticsearch.test.ESTestCase;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicReference;
public class ActionListenerTests extends ESTestCase {
public void testWrap() {
AtomicReference<Boolean> reference = new AtomicReference<>();
AtomicReference<Exception> exReference = new AtomicReference<>();
CheckedConsumer<Boolean, ? extends Exception> handler = (o) -> {
if (Boolean.FALSE.equals(o)) {
throw new IllegalArgumentException("must not be false");
}
reference.set(o);
};
ActionListener<Boolean> wrap = ActionListener.wrap(handler, exReference::set);
wrap.onResponse(Boolean.FALSE);
assertNull(reference.get());
assertNotNull(exReference.get());
assertEquals("must not be false", exReference.get().getMessage());
exReference.set(null);
wrap.onResponse(Boolean.TRUE);
assertTrue(reference.get());
assertNull(exReference.get());
}
public void testOnResponse() {
final int numListeners = randomIntBetween(1, 20);
List<AtomicReference<Boolean>> refList = new ArrayList<>();
List<AtomicReference<Exception>> excList = new ArrayList<>();
List<ActionListener<Boolean>> listeners = new ArrayList<>();
List<Boolean> failOnTrue = new ArrayList<>();
AtomicInteger exceptionCounter = new AtomicInteger(0);
for (int i = 0; i < numListeners; i++) {
boolean doFailOnTrue = rarely();
failOnTrue.add(doFailOnTrue);
AtomicReference<Boolean> reference = new AtomicReference<>();
AtomicReference<Exception> exReference = new AtomicReference<>();
refList.add(reference);
excList.add(exReference);
CheckedConsumer<Boolean, ? extends Exception> handler = (o) -> {
if (Boolean.FALSE.equals(o)) {
throw new IllegalArgumentException("must not be false " + exceptionCounter.getAndIncrement());
}
if (doFailOnTrue) {
throw new IllegalStateException("must not be true");
}
reference.set(o);
};
listeners.add(ActionListener.wrap(handler, exReference::set));
}
ActionListener.onResponse(listeners, Boolean.TRUE);
for (int i = 0; i < numListeners; i++) {
if (failOnTrue.get(i) == false) {
assertTrue("listener index " + i, refList.get(i).get());
refList.get(i).set(null);
} else {
assertNull("listener index " + i, refList.get(i).get());
}
}
for (int i = 0; i < numListeners; i++) {
if (failOnTrue.get(i) == false) {
assertNull("listener index " + i, excList.get(i).get());
} else {
assertEquals("listener index " + i, "must not be true", excList.get(i).get().getMessage());
}
}
ActionListener.onResponse(listeners, Boolean.FALSE);
for (int i = 0; i < numListeners; i++) {
assertNull("listener index " + i, refList.get(i).get());
}
assertEquals(numListeners, exceptionCounter.get());
for (int i = 0; i < numListeners; i++) {
assertNotNull(excList.get(i).get());
assertEquals("listener index " + i, "must not be false " + i, excList.get(i).get().getMessage());
}
}
public void testOnFailure() {
final int numListeners = randomIntBetween(1, 20);
List<AtomicReference<Boolean>> refList = new ArrayList<>();
List<AtomicReference<Exception>> excList = new ArrayList<>();
List<ActionListener<Boolean>> listeners = new ArrayList<>();
final int listenerToFail = randomBoolean() ? -1 : randomIntBetween(0, numListeners-1);
for (int i = 0; i < numListeners; i++) {
AtomicReference<Boolean> reference = new AtomicReference<>();
AtomicReference<Exception> exReference = new AtomicReference<>();
refList.add(reference);
excList.add(exReference);
boolean fail = i == listenerToFail;
CheckedConsumer<Boolean, ? extends Exception> handler = (o) -> {
reference.set(o);
};
listeners.add(ActionListener.wrap(handler, (e) -> {
exReference.set(e);
if (fail) {
throw new RuntimeException("double boom");
}
}));
}
try {
ActionListener.onFailure(listeners, new Exception("booom"));
assertTrue("unexpected succces listener to fail: " + listenerToFail, listenerToFail == -1);
} catch (RuntimeException ex) {
assertTrue("listener to fail: " + listenerToFail, listenerToFail >= 0);
assertNotNull(ex.getCause());
assertEquals("double boom", ex.getCause().getMessage());
}
for (int i = 0; i < numListeners; i++) {
assertNull("listener index " + i, refList.get(i).get());
}
for (int i = 0; i < numListeners; i++) {
assertEquals("listener index " + i, "booom", excList.get(i).get().getMessage());
}
}
}