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The Java operations layer for the MongoDB Java Driver.
Third parties can wrap this layer to provide custom higher-level APIs
/*
* Copyright 2008-present MongoDB, Inc.
*
* Licensed 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.mongodb.event;
import com.mongodb.annotations.Immutable;
import com.mongodb.diagnostics.logging.Logger;
import com.mongodb.diagnostics.logging.Loggers;
import java.util.ArrayList;
import java.util.List;
import static com.mongodb.assertions.Assertions.isTrue;
import static com.mongodb.assertions.Assertions.notNull;
import static java.lang.String.format;
import static java.util.Collections.unmodifiableList;
/**
* A multicaster for cluster events.
*
* @since 3.3
* @deprecated register multiple cluster listeners instead
*/
@Deprecated
@Immutable
public final class ClusterEventMulticaster implements ClusterListener {
private static final Logger LOGGER = Loggers.getLogger("cluster.event");
private final List clusterListeners;
/**
* Construct an instance with the given list of cluster listeners
*
* @param clusterListeners the non-null list of cluster listeners, none of which may be null
*/
public ClusterEventMulticaster(final List clusterListeners) {
notNull("clusterListeners", clusterListeners);
isTrue("All ClusterListener instances are non-null", !clusterListeners.contains(null));
this.clusterListeners = new ArrayList(clusterListeners);
}
/**
* Gets the cluster listeners.
*
* @return the cluster listeners
*/
public List getClusterListeners() {
return unmodifiableList(clusterListeners);
}
@Override
public void clusterOpening(final ClusterOpeningEvent event) {
for (final ClusterListener cur : clusterListeners) {
try {
cur.clusterOpening(event);
} catch (Exception e) {
if (LOGGER.isWarnEnabled()) {
LOGGER.warn(format("Exception thrown raising cluster opening event to listener %s", cur), e);
}
}
}
}
@Override
public void clusterClosed(final ClusterClosedEvent event) {
for (final ClusterListener cur : clusterListeners) {
try {
cur.clusterClosed(event);
} catch (Exception e) {
if (LOGGER.isWarnEnabled()) {
LOGGER.warn(format("Exception thrown raising cluster closed event to listener %s", cur), e);
}
}
}
}
@Override
public void clusterDescriptionChanged(final ClusterDescriptionChangedEvent event) {
for (final ClusterListener cur : clusterListeners) {
try {
cur.clusterDescriptionChanged(event);
} catch (Exception e) {
if (LOGGER.isWarnEnabled()) {
LOGGER.warn(format("Exception thrown raising cluster description changed event to listener %s", cur), e);
}
}
}
}
}