com.alibaba.rocketmq.common.sysflag.PullSysFlag Maven / Gradle / Ivy

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/**
 * Copyright (C) 2010-2013 Alibaba Group Holding Limited
 *
 * 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.alibaba.rocketmq.common.sysflag;

/**
 * Pull接口用到的flag定义
 * 
 * @author shijia.wxr
 */
public class PullSysFlag {
    private final static int FLAG_COMMIT_OFFSET = 0x1 << 0;
    private final static int FLAG_SUSPEND = 0x1 << 1;
    private final static int FLAG_SUBSCRIPTION = 0x1 << 2;
    private final static int FLAG_CLASS_FILTER = 0x1 << 3;


    public static int buildSysFlag(final boolean commitOffset, final boolean suspend,
            final boolean subscription, final boolean classFilter) {
        int flag = 0;

        if (commitOffset) {
            flag |= FLAG_COMMIT_OFFSET;
        }

        if (suspend) {
            flag |= FLAG_SUSPEND;
        }

        if (subscription) {
            flag |= FLAG_SUBSCRIPTION;
        }

        if (classFilter) {
            flag |= FLAG_CLASS_FILTER;
        }

        return flag;
    }


    public static int clearCommitOffsetFlag(final int sysFlag) {
        return sysFlag & (~FLAG_COMMIT_OFFSET);
    }


    public static boolean hasCommitOffsetFlag(final int sysFlag) {
        return (sysFlag & FLAG_COMMIT_OFFSET) == FLAG_COMMIT_OFFSET;
    }


    public static boolean hasSuspendFlag(final int sysFlag) {
        return (sysFlag & FLAG_SUSPEND) == FLAG_SUSPEND;
    }


    public static boolean hasSubscriptionFlag(final int sysFlag) {
        return (sysFlag & FLAG_SUBSCRIPTION) == FLAG_SUBSCRIPTION;
    }


    public static boolean hasClassFilterFlag(final int sysFlag) {
        return (sysFlag & FLAG_CLASS_FILTER) == FLAG_CLASS_FILTER;
    }
}