zipkin.storage.cassandra.CassandraDependenciesWriter Maven / Gradle / Ivy
/**
* Copyright 2015-2016 The OpenZipkin Authors
*
* 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 zipkin.storage.cassandra;
import com.datastax.driver.core.BoundStatement;
import com.datastax.driver.core.PreparedStatement;
import com.datastax.driver.core.Session;
import com.datastax.driver.core.querybuilder.QueryBuilder;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.util.concurrent.Futures;
import com.google.common.util.concurrent.ListenableFuture;
import java.nio.ByteBuffer;
import java.util.Date;
import java.util.List;
import zipkin.DependencyLink;
import zipkin.internal.Dependencies;
import zipkin.internal.Util;
final class CassandraDependenciesWriter {
private final PreparedStatement insertDependencies;
private final Session session;
CassandraDependenciesWriter(Session session) {
this.session = session;
insertDependencies = session.prepare(QueryBuilder.insertInto("dependencies")
.value("day", QueryBuilder.bindMarker("day"))
.value("dependencies", QueryBuilder.bindMarker("dependencies")));
}
@VisibleForTesting void write(List links, long timestampMillis) {
long midnight = Util.midnightUTC(timestampMillis);
Dependencies deps = Dependencies.create(midnight, midnight /* ignored */, links);
ByteBuffer thrift = deps.toThrift();
Futures.getUnchecked(storeDependencies(midnight, thrift));
}
ListenableFuture storeDependencies(long epochDayMillis, ByteBuffer dependencies) {
Date startFlooredToDay = new Date(epochDayMillis);
try {
BoundStatement bound = CassandraUtil.bindWithName(insertDependencies, "insert-dependencies")
.setTimestamp("day", startFlooredToDay)
.setBytes("dependencies", dependencies);
return session.executeAsync(bound);
} catch (RuntimeException ex) {
return Futures.immediateFailedFuture(ex);
}
}
}