org.apache.flink.runtime.state.FullSnapshotUtil Maven / Gradle / Ivy
/*
* 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.state;
/**
* Utility methods and constants around creating and restoring full snapshots using {@link
* FullSnapshotAsyncWriter}.
*/
public class FullSnapshotUtil {
public static final int FIRST_BIT_IN_BYTE_MASK = 0x80;
public static final int END_OF_KEY_GROUP_MARK = 0xFFFF;
public static void setMetaDataFollowsFlagInKey(byte[] key) {
key[0] |= FIRST_BIT_IN_BYTE_MASK;
}
public static void clearMetaDataFollowsFlag(byte[] key) {
key[0] &= (~FIRST_BIT_IN_BYTE_MASK);
}
public static boolean hasMetaDataFollowsFlag(byte[] key) {
return 0 != (key[0] & FIRST_BIT_IN_BYTE_MASK);
}
private FullSnapshotUtil() {
throw new AssertionError();
}
}