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// Copyright Verizon Media. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.http.client.core.communication;
import com.yahoo.vespa.http.client.FeedClient;
import com.yahoo.vespa.http.client.FeedEndpointException;
import com.yahoo.vespa.http.client.ManualClock;
import com.yahoo.vespa.http.client.Result;
import com.yahoo.vespa.http.client.config.Cluster;
import com.yahoo.vespa.http.client.config.ConnectionParams;
import com.yahoo.vespa.http.client.config.Endpoint;
import com.yahoo.vespa.http.client.config.SessionParams;
import com.yahoo.vespa.http.client.core.Document;
import com.yahoo.vespa.http.client.core.ServerResponseException;
import com.yahoo.vespa.http.client.core.ThrottlePolicy;
import com.yahoo.vespa.http.client.core.operationProcessor.IncompleteResultsThrottler;
import com.yahoo.vespa.http.client.core.operationProcessor.OperationProcessor;
import org.junit.Test;
import java.io.IOException;
import java.time.Duration;
import java.time.Instant;
import java.util.List;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotSame;
/**
* TODO: Migrate IOThreadTests here.
*
* @author bratseth
*/
public class IOThreadTest {
@Test
public void testSuccessfulWriting() {
OperationProcessorTester tester = new OperationProcessorTester();
assertEquals(0, tester.incomplete());
assertEquals(0, tester.success());
assertEquals(0, tester.failures());
tester.send("doc1");
tester.send("doc2");
tester.send("doc3");
assertEquals(3, tester.incomplete());
assertEquals(0, tester.success());
assertEquals(0, tester.failures());
tester.tick(1); // connect
assertEquals(3, tester.incomplete());
tester.tick(1); // sync
assertEquals(3, tester.incomplete());
tester.tick(1); // process queue
assertEquals(0, tester.incomplete());
assertEquals(3, tester.success());
assertEquals(0, tester.failures());
}
@Test
public void testExceptionOnConnect() {
OperationProcessorTester tester = new OperationProcessorTester();
IOThread ioThread = tester.getSingleIOThread();
DryRunGatewayConnection firstConnection = (DryRunGatewayConnection)ioThread.currentConnection();
firstConnection.throwOnHandshake(new ServerResponseException(403, "Not authorized"));
tester.send("doc1");
tester.tick(3);
assertEquals(1, tester.incomplete());
assertEquals(0, ioThread.resultQueue().getPendingSize());
assertEquals(0, tester.success());
assertEquals("Awaiting retry", 0, tester.failures());
}
@Test
public void testExceptionOnHandshake() {
OperationProcessorTester tester = new OperationProcessorTester();
IOThread ioThread = tester.getSingleIOThread();
DryRunGatewayConnection firstConnection = (DryRunGatewayConnection)ioThread.currentConnection();
firstConnection.throwOnHandshake(new ServerResponseException(403, "Not authorized"));
tester.send("doc1");
tester.tick(3);
assertEquals(1, tester.incomplete());
assertEquals(0, ioThread.resultQueue().getPendingSize());
assertEquals(0, tester.success());
assertEquals("Awaiting retry", 0, tester.failures());
}
@Test
public void testExceptionOnWrite() {
OperationProcessorTester tester = new OperationProcessorTester();
IOThread ioThread = tester.getSingleIOThread();
DryRunGatewayConnection firstConnection = (DryRunGatewayConnection)ioThread.currentConnection();
firstConnection.throwOnWrite(new IOException("Test failure"));
tester.send("doc1");
tester.tick(3);
assertEquals(1, tester.incomplete());
assertEquals(0, ioThread.resultQueue().getPendingSize());
assertEquals(0, tester.success());
assertEquals("Awaiting retry since write exceptions is a transient failure",
0, tester.failures());
}
@Test
public void testPollingOldConnections() {
OperationProcessorTester tester = new OperationProcessorTester();
tester.tick(3);
IOThread ioThread = tester.getSingleIOThread();
DryRunGatewayConnection firstConnection = (DryRunGatewayConnection)ioThread.currentConnection();
assertEquals(0, ioThread.oldConnections().size());
firstConnection.hold(true);
tester.send("doc1");
tester.tick(1);
tester.clock().advance(Duration.ofSeconds(16)); // Default connection ttl is 15
tester.tick(3);
assertEquals(1, ioThread.oldConnections().size());
assertEquals(firstConnection, ioThread.oldConnections().get(0));
assertNotSame(firstConnection, ioThread.currentConnection());
assertEquals(16, firstConnection.lastPollTime().toEpochMilli() / 1000);
// Check old connection poll pattern (exponential backoff)
assertLastPollTimeWhenAdvancing(16, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(18, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(18, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(18, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(18, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(22, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(22, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(22, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(22, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(22, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(22, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(22, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(22, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(30, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(30, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(30, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(30, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(30, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(30, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(30, 1, firstConnection, tester);
assertLastPollTimeWhenAdvancing(30, 1, firstConnection, tester);
tester.clock().advance(Duration.ofSeconds(200));
tester.tick(1);
assertEquals("Old connection is eventually removed", 0, ioThread.oldConnections().size());
}
private void assertLastPollTimeWhenAdvancing(int lastPollTimeSeconds,
int advanceSeconds,
DryRunGatewayConnection connection,
OperationProcessorTester tester) {
tester.clock().advance(Duration.ofSeconds(advanceSeconds));
tester.tick(1);
assertEquals(lastPollTimeSeconds, connection.lastPollTime().toEpochMilli() / 1000);
}
private static class OperationProcessorTester {
private final Endpoint endpoint;
private final int clusterId = 0;
private final ManualClock clock;
private final TestResultCallback resultCallback;
private final OperationProcessor operationProcessor;
public OperationProcessorTester() {
endpoint = Endpoint.create("test-endpoint");
SessionParams.Builder params = new SessionParams.Builder();
Cluster.Builder clusterParams = new Cluster.Builder();
clusterParams.addEndpoint(endpoint);
params.addCluster(clusterParams.build());
ConnectionParams.Builder connectionParams = new ConnectionParams.Builder();
connectionParams.setDryRun(true);
connectionParams.setRunThreads(false);
params.setConnectionParams(connectionParams.build());
clock = new ManualClock(Instant.ofEpochMilli(0));
resultCallback = new TestResultCallback();
operationProcessor = new OperationProcessor(new IncompleteResultsThrottler(1, 100, clock, new ThrottlePolicy()),
resultCallback,
params.build(),
new ScheduledThreadPoolExecutor(1),
clock);
}
public ManualClock clock() { return clock; }
/** Asserts that this has but a single IOThread and returns it */
public IOThread getSingleIOThread() {
assertEquals(1, clusterConnections().size());
assertEquals(1, clusterConnections().get(0).ioThreads().size());
return clusterConnections().get(0).ioThreads().get(0);
}
/** Do n iteration of work in all io threads of this */
public void tick(int n) {
for (int i = 0; i < n; i++)
for (ClusterConnection cluster : operationProcessor.clusters())
for (IOThread thread : cluster.ioThreads())
thread.tick();
}
public void send(String documentId) {
operationProcessor.sendDocument(new Document(documentId, documentId, "data of " + documentId, null, clock.instant()));
}
public int incomplete() {
return operationProcessor.getIncompleteResultQueueSize();
}
public int success() {
return resultCallback.successes;
}
public List<ClusterConnection> clusterConnections() {
return operationProcessor.clusters();
}
public int failures() {
return resultCallback.failures;
}
public int endpointExceptions() {
return resultCallback.endpointExceptions;
}
public Result lastResult() {
return resultCallback.lastResult;
}
}
private static class TestResultCallback implements FeedClient.ResultCallback {
private int successes = 0;
private int failures = 0;
private int endpointExceptions = 0;
private Result lastResult;
@Override
public void onCompletion(String docId, Result documentResult) {
this.lastResult = documentResult;
if (documentResult.isSuccess())
successes++;
else
failures++;
}
@Override
public void onEndpointException(FeedEndpointException exception) {
endpointExceptions++;
}
}
}
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