com.datastax.oss.driver.internal.core.tracker.MultiplexingRequestTracker Maven / Gradle / Ivy
/*
* 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 com.datastax.oss.driver.internal.core.tracker;
import com.datastax.oss.driver.api.core.config.DriverExecutionProfile;
import com.datastax.oss.driver.api.core.metadata.Node;
import com.datastax.oss.driver.api.core.session.Request;
import com.datastax.oss.driver.api.core.session.Session;
import com.datastax.oss.driver.api.core.tracker.RequestTracker;
import com.datastax.oss.driver.internal.core.util.Loggers;
import edu.umd.cs.findbugs.annotations.NonNull;
import edu.umd.cs.findbugs.annotations.Nullable;
import java.util.Arrays;
import java.util.Collection;
import java.util.List;
import java.util.Objects;
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.function.Consumer;
import net.jcip.annotations.ThreadSafe;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Combines multiple request trackers into a single one.
*
* Any exception thrown by a child tracker is caught and logged.
*/
@ThreadSafe
public class MultiplexingRequestTracker implements RequestTracker {
private static final Logger LOG = LoggerFactory.getLogger(MultiplexingRequestTracker.class);
private final List trackers = new CopyOnWriteArrayList<>();
public MultiplexingRequestTracker() {}
public MultiplexingRequestTracker(RequestTracker... trackers) {
this(Arrays.asList(trackers));
}
public MultiplexingRequestTracker(Collection trackers) {
addTrackers(trackers);
}
private void addTrackers(Collection source) {
for (RequestTracker tracker : source) {
addTracker(tracker);
}
}
private void addTracker(RequestTracker toAdd) {
Objects.requireNonNull(toAdd, "tracker cannot be null");
if (toAdd instanceof MultiplexingRequestTracker) {
addTrackers(((MultiplexingRequestTracker) toAdd).trackers);
} else {
trackers.add(toAdd);
}
}
public void register(@NonNull RequestTracker tracker) {
addTracker(tracker);
}
@Override
public void onSuccess(
@NonNull Request request,
long latencyNanos,
@NonNull DriverExecutionProfile executionProfile,
@NonNull Node node,
@NonNull String logPrefix) {
invokeTrackers(
tracker -> tracker.onSuccess(request, latencyNanos, executionProfile, node, logPrefix),
logPrefix,
"onSuccess");
}
@Override
public void onError(
@NonNull Request request,
@NonNull Throwable error,
long latencyNanos,
@NonNull DriverExecutionProfile executionProfile,
@Nullable Node node,
@NonNull String logPrefix) {
invokeTrackers(
tracker -> tracker.onError(request, error, latencyNanos, executionProfile, node, logPrefix),
logPrefix,
"onError");
}
@Override
public void onNodeSuccess(
@NonNull Request request,
long latencyNanos,
@NonNull DriverExecutionProfile executionProfile,
@NonNull Node node,
@NonNull String logPrefix) {
invokeTrackers(
tracker -> tracker.onNodeSuccess(request, latencyNanos, executionProfile, node, logPrefix),
logPrefix,
"onNodeSuccess");
}
@Override
public void onNodeError(
@NonNull Request request,
@NonNull Throwable error,
long latencyNanos,
@NonNull DriverExecutionProfile executionProfile,
@NonNull Node node,
@NonNull String logPrefix) {
invokeTrackers(
tracker ->
tracker.onNodeError(request, error, latencyNanos, executionProfile, node, logPrefix),
logPrefix,
"onNodeError");
}
@Override
public void onSessionReady(@NonNull Session session) {
invokeTrackers(tracker -> tracker.onSessionReady(session), session.getName(), "onSessionReady");
}
@Override
public void close() throws Exception {
for (RequestTracker tracker : trackers) {
try {
tracker.close();
} catch (Exception e) {
Loggers.warnWithException(
LOG, "Unexpected error while closing request tracker {}.", tracker, e);
}
}
}
private void invokeTrackers(
@NonNull Consumer action, String logPrefix, String event) {
for (RequestTracker tracker : trackers) {
try {
action.accept(tracker);
} catch (Exception e) {
Loggers.warnWithException(
LOG,
"[{}] Unexpected error while notifying request tracker {} of an {} event.",
logPrefix,
tracker,
event,
e);
}
}
}
}