/*
* 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 org.apache.flink.runtime.query.netty.message;
import org.apache.flink.util.Preconditions;
/**
* A successful response to a {@link KvStateRequest} containing the serialized
* result for the requested key and namespace.
*/
public final class KvStateRequestResult {
/** ID of the request responding to. */
private final long requestId;
/**
* Serialized result for the requested key and namespace. If no result was
* available for the specified key and namespace, this is <code>null</code>.
*/
private final byte[] serializedResult;
/**
* Creates a successful {@link KvStateRequestResult} response.
*
* @param requestId ID of the request responding to
* @param serializedResult Serialized result or <code>null</code> if none
*/
KvStateRequestResult(long requestId, byte[] serializedResult) {
this.requestId = requestId;
this.serializedResult = Preconditions.checkNotNull(serializedResult, "Serialization result");
}
/**
* Returns the request ID responding to.
*
* @return Request ID responding to
*/
public long getRequestId() {
return requestId;
}
/**
* Returns the serialized result or <code>null</code> if none available.
*
* @return Serialized result or <code>null</code> if none available.
*/
public byte[] getSerializedResult() {
return serializedResult;
}
@Override
public String toString() {
return "KvStateRequestResult{" +
"requestId=" + requestId +
", serializedResult.length=" + serializedResult.length +
'}';
}
}