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TopicBacklogReaderImpl.java
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TopicBacklogReaderImpl.java
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/*
* Copyright 2020 Google LLC
*
* 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.google.cloud.pubsublite.beam;
import static com.google.cloud.pubsublite.internal.ExtractStatus.toCanonical;
import static com.google.common.base.Preconditions.checkNotNull;
import com.google.api.gax.rpc.ApiException;
import com.google.cloud.pubsublite.Offset;
import com.google.cloud.pubsublite.Partition;
import com.google.cloud.pubsublite.TopicPath;
import com.google.cloud.pubsublite.internal.TopicStatsClient;
import com.google.cloud.pubsublite.proto.ComputeMessageStatsResponse;
import java.util.concurrent.ExecutionException;
import javax.annotation.Nonnull;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
final class TopicBacklogReaderImpl implements TopicBacklogReader {
private static final Logger LOG = LoggerFactory.getLogger(TopicBacklogReaderImpl.class);
private final TopicStatsClient client;
private final TopicPath topicPath;
private final Partition partition;
public TopicBacklogReaderImpl(TopicStatsClient client, TopicPath topicPath, Partition partition) {
this.client = client;
this.topicPath = topicPath;
this.partition = partition;
}
@Override
@SuppressWarnings("assignment.type.incompatible")
public ComputeMessageStatsResponse computeMessageStats(Offset offset) throws ApiException {
try {
return client
.computeMessageStats(topicPath, partition, offset, Offset.of(Integer.MAX_VALUE))
.get();
} catch (ExecutionException e) {
@Nonnull Throwable cause = checkNotNull(e.getCause());
throw toCanonical(cause).underlying;
} catch (InterruptedException e) {
throw toCanonical(e).underlying;
}
}
@Override
public void close() {
try {
client.close();
} catch (Exception e) {
LOG.warn("Failed to close topic stats client.", e);
}
}
}