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// Copyright 2017 Yahoo Holdings. 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.fasterxml.jackson.core.JsonFactory;
import com.fasterxml.jackson.core.JsonGenerator;
import com.fasterxml.jackson.databind.ObjectMapper;
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.FeedParams;
import com.yahoo.vespa.http.client.core.Document;
import com.yahoo.vespa.http.client.core.Exceptions;
import com.yahoo.vespa.http.client.core.operationProcessor.OperationProcessor;
import java.io.IOException;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
/**
* @author Einar M R Rosenvinge
*/
public class ClusterConnection implements AutoCloseable {
private static final JsonFactory jsonFactory = new JsonFactory();
private static final ObjectMapper objectMapper = new ObjectMapper();
private final List<IOThread> ioThreads = new ArrayList<>();
private final int clusterId;
private final ThreadGroup ioThreadGroup;
/** The shared queue of document operations the io threads will take from */
private final DocumentQueue documentQueue;
/** The single endpoint this sends to, or null if it will send to multiple endpoints */
private final Endpoint singleEndpoint;
public ClusterConnection(OperationProcessor operationProcessor,
FeedParams feedParams,
ConnectionParams connectionParams,
Cluster cluster,
int clusterId,
int clientQueueSizePerCluster,
ScheduledThreadPoolExecutor timeoutExecutor) {
if (cluster.getEndpoints().isEmpty())
throw new IllegalArgumentException("At least a single endpoint is required in " + cluster);
this.clusterId = clusterId;
int totalNumberOfEndpointsInThisCluster = cluster.getEndpoints().size() * connectionParams.getNumPersistentConnectionsPerEndpoint();
if (totalNumberOfEndpointsInThisCluster == 0)
throw new IllegalArgumentException("At least 1 persistent connection per endpoint is required in " + cluster);
int maxInFlightPerSession = Math.max(1, feedParams.getMaxInFlightRequests() / totalNumberOfEndpointsInThisCluster);
documentQueue = new DocumentQueue(clientQueueSizePerCluster);
ioThreadGroup = operationProcessor.getIoThreadGroup();
singleEndpoint = cluster.getEndpoints().size() == 1 ? cluster.getEndpoints().get(0) : null;
Double idlePollFrequency = feedParams.getIdlePollFrequency();
if (idlePollFrequency == null)
idlePollFrequency = 10.0;
for (Endpoint endpoint : cluster.getEndpoints()) {
EndpointResultQueue endpointResultQueue = new EndpointResultQueue(operationProcessor,
endpoint,
clusterId,
timeoutExecutor,
feedParams.getServerTimeout(TimeUnit.MILLISECONDS) + feedParams.getClientTimeout(TimeUnit.MILLISECONDS));
for (int i = 0; i < connectionParams.getNumPersistentConnectionsPerEndpoint(); i++) {
GatewayConnectionFactory connectionFactory;
if (connectionParams.isDryRun()) {
connectionFactory = new DryRunGatewayConnectionFactory(endpoint);
} else {
connectionFactory = new ApacheGatewayConnectionFactory(endpoint,
feedParams,
cluster.getRoute(),
connectionParams,
new ApacheGatewayConnection.HttpClientFactory(connectionParams, endpoint.isUseSsl()),
operationProcessor.getClientId()
);
}
IOThread ioThread = new IOThread(operationProcessor.getIoThreadGroup(),
endpoint,
endpointResultQueue,
connectionFactory,
clusterId,
feedParams.getMaxChunkSizeBytes(),
maxInFlightPerSession,
feedParams.getLocalQueueTimeOut(),
documentQueue,
feedParams.getMaxSleepTimeMs(),
idlePollFrequency);
ioThreads.add(ioThread);
}
}
}
public int getClusterId() {
return clusterId;
}
public void post(Document document) throws EndpointIOException {
try {
documentQueue.put(document, Thread.currentThread().getThreadGroup() == ioThreadGroup);
} catch (Throwable t) { // InterruptedException if shutting down, IllegalStateException if already shut down
throw new EndpointIOException(singleEndpoint, "While sending", t);
}
}
@SuppressWarnings("ThrowableResultOfMethodCallIgnored")
@Override
public void close() {
List<Exception> exceptions = new ArrayList<>();
for (IOThread ioThread : ioThreads) {
try {
ioThread.close();
} catch (Exception e) {
exceptions.add(e);
}
}
if (exceptions.isEmpty()) {
return;
}
if (exceptions.size() == 1) {
if (exceptions.get(0) instanceof RuntimeException) {
throw (RuntimeException) exceptions.get(0);
} else {
throw new RuntimeException(exceptions.get(0));
}
}
StringBuilder b = new StringBuilder();
b.append("Exception thrown while closing one or more endpoints: ");
for (int i = 0; i < exceptions.size(); i++) {
Exception e = exceptions.get(i);
b.append(Exceptions.toMessageString(e));
if (i != (exceptions.size() - 1)) {
b.append(", ");
}
}
throw new RuntimeException(b.toString(), exceptions.get(0));
}
public String getStatsAsJSon() throws IOException {
StringWriter stringWriter = new StringWriter();
JsonGenerator jsonGenerator = jsonFactory.createGenerator(stringWriter);
jsonGenerator.writeStartObject();
jsonGenerator.writeArrayFieldStart("session");
for (IOThread ioThread : ioThreads) {
jsonGenerator.writeStartObject();
jsonGenerator.writeObjectFieldStart("endpoint");
jsonGenerator.writeStringField("host", ioThread.getEndpoint().getHostname());
jsonGenerator.writeNumberField("port", ioThread.getEndpoint().getPort());
jsonGenerator.writeEndObject();
jsonGenerator.writeFieldName("stats");
IOThread.ConnectionStats connectionStats = ioThread.getConnectionStats();
objectMapper.writeValue(jsonGenerator, connectionStats);
jsonGenerator.writeEndObject();
}
jsonGenerator.writeEndArray();
jsonGenerator.writeEndObject();
jsonGenerator.close();
return stringWriter.toString();
}
@Override
public boolean equals(Object o) {
return (this == o) || (o instanceof ClusterConnection && clusterId == ((ClusterConnection) o).clusterId);
}
@Override
public int hashCode() {
return clusterId;
}
}
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