zipkin.storage.cassandra.TimestampCodec 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.ProtocolVersion;
import com.datastax.driver.core.Row;
import com.datastax.driver.core.Session;
import com.datastax.driver.core.TypeCodec;
import java.nio.ByteBuffer;
final class TimestampCodec {
private final ProtocolVersion protocolVersion;
TimestampCodec(ProtocolVersion protocolVersion) {
this.protocolVersion = protocolVersion;
}
public TimestampCodec(Session session) {
this(session.getCluster().getConfiguration().getProtocolOptions().getProtocolVersion());
}
/**
* Truncates timestamp to milliseconds and converts to binary for using with setBytesUnsafe() to
* avoid allocating java.util.Date
*/
public ByteBuffer serialize(long timestamp) {
return TypeCodec.bigint().serialize(timestamp / 1000L, protocolVersion);
}
/**
* Reads timestamp binary value directly (getBytesUnsafe) to avoid allocating java.util.Date, and
* converts to microseconds.
*/
public long deserialize(Row row, String name) {
return 1000L * TypeCodec.bigint().deserialize(row.getBytesUnsafe(name), protocolVersion);
}
}