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/*
* 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.
*/
package org.apache.tinkerpop.gremlin.driver.remote;
import org.apache.tinkerpop.gremlin.driver.AbstractResultQueueTest;
import org.apache.tinkerpop.gremlin.driver.Client;
import org.apache.tinkerpop.gremlin.driver.ResultSet;
import org.apache.tinkerpop.gremlin.driver.message.RequestMessage;
import org.apache.tinkerpop.gremlin.process.traversal.TraversalSideEffects;
import org.junit.Test;
import org.mockito.stubbing.Answer;
import java.util.UUID;
import java.util.concurrent.CompletableFuture;
import static org.hamcrest.core.IsInstanceOf.instanceOf;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.fail;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
/**
* @author Stephen Mallette (http://stephen.genoprime.com)
*/
public class DriverRemoteTraversalSideEffectsTest extends AbstractResultQueueTest {
@Test
public void shouldNotContactRemoteForKeysAfterCloseIsCalled() throws Exception {
final Client client = mock(Client.class);
mockClientForCall(client);
mockClientForCall(client);
final UUID sideEffectKey = UUID.fromString("31dec2c6-b214-4a6f-a68b-996608dce0d9");
final CompletableFuture<Void> ready = new CompletableFuture<>();
ready.complete(null);
final TraversalSideEffects sideEffects = new DriverRemoteTraversalSideEffects(client, sideEffectKey, null, ready);
assertEquals(1, sideEffects.keys().size());
sideEffects.close();
// call this again and again and it will only hit the cached keys - no more server calls
assertEquals(1, sideEffects.keys().size());
assertEquals(1, sideEffects.keys().size());
assertEquals(1, sideEffects.keys().size());
assertEquals(1, sideEffects.keys().size());
// once for the keys and once for the close message
verify(client, times(2)).submitAsync(any(RequestMessage.class));
}
@Test
public void shoudlNotContactRemoteForGetAfterCloseIsCalled() throws Exception {
final Client client = mock(Client.class);
mockClientForCall(client);
mockClientForCall(client);
final UUID sideEffectKey = UUID.fromString("31dec2c6-b214-4a6f-a68b-996608dce0d9");
final CompletableFuture<Void> ready = new CompletableFuture<>();
ready.complete(null);
final TraversalSideEffects sideEffects = new DriverRemoteTraversalSideEffects(client, sideEffectKey, null, ready);
assertNotNull(sideEffects.get("test-0"));
sideEffects.close();
// Side effect 'a' should be cached locally
assertNotNull(sideEffects.get("test-0"));
assertNotNull(sideEffects.get("test-0"));
assertNotNull(sideEffects.get("test-0"));
// Once for keys, once for get and once for close
verify(client, times(3)).submitAsync(any(RequestMessage.class));
}
@Test
public void shouldNotContactRemoteMoreThanOnceForClose() throws Exception {
final Client client = mock(Client.class);
mockClientForCall(client);
final UUID sideEffectKey = UUID.fromString("31dec2c6-b214-4a6f-a68b-996608dce0d9");
final CompletableFuture<Void> ready = new CompletableFuture<>();
ready.complete(null);
final TraversalSideEffects sideEffects = new DriverRemoteTraversalSideEffects(client, sideEffectKey, null, ready);
sideEffects.close();
sideEffects.close();
sideEffects.close();
sideEffects.close();
sideEffects.close();
try {
sideEffects.keys();
fail("The traversal is closed");
} catch (Exception ex) {
assertThat(ex, instanceOf(IllegalStateException.class));
assertEquals("Traversal has been closed - side-effect keys cannot be retrieved", ex.getMessage());
}
try {
sideEffects.get("a");
fail("The traversal is closed");
} catch (Exception ex) {
assertThat(ex, instanceOf(IllegalStateException.class));
assertEquals("Traversal has been closed - side-effect keys cannot be retrieved", ex.getMessage());
}
// once for the close message
verify(client, times(1)).submitAsync(any(RequestMessage.class));
}
private void mockClientForCall(final Client client) throws Exception {
// the return is just generic garbage from addToQueue for any call to submitAsync().
when(client.submitAsync(any(RequestMessage.class))).thenAnswer((Answer<Object>) invocationOnMock -> {
final ResultSet returnedResultSet = new ResultSet(resultQueue, pool, readCompleted, RequestMessage.build("traversal").create(), null);
addToQueue(1, 0, true, true, 1);
final CompletableFuture<ResultSet> returnedFuture = new CompletableFuture<>();
returnedFuture.complete(returnedResultSet);
return returnedFuture;
});
}
}