Examples with ArbitrateException com.alibaba.otter.shared.arbitrate.exception.ArbitrateException used on opensource projects

Example 26 with ArbitrateException

use of com.alibaba.otter.shared.arbitrate.exception.ArbitrateException in project otter by alibaba.

the class SelectRpcArbitrateEvent method await.

public EtlEventData await(Long pipelineId) throws InterruptedException {
    Assert.notNull(pipelineId);
    PermitMonitor permitMonitor = ArbitrateFactory.getInstance(pipelineId, PermitMonitor.class);
    // 阻塞等待授权
    permitMonitor.waitForPermit();
    SelectProcessListener selectProcessListener = ArbitrateFactory.getInstance(pipelineId, SelectProcessListener.class);
    // 符合条件的processId
    Long processId = selectProcessListener.waitForProcess();
    ChannelStatus status = permitMonitor.getChannelPermit();
    if (status.isStart()) {
        // 即时查询一下当前的状态，状态随时可能会变
        try {
            EtlEventData eventData = new EtlEventData();
            eventData.setPipelineId(pipelineId);
            eventData.setProcessId(processId);
            // 返回当前时间
            eventData.setStartTime(new Date().getTime());
            // 获取下一个处理节点信息
            Node node = LoadBalanceFactory.getNextExtractNode(pipelineId);
            if (node == null) {
                // terminEvent.single(termin);
                throw new ArbitrateException("Select_single", "no next node");
            } else {
                eventData.setNextNid(node.getId());
                // 标记为已使用
                markUsed(eventData);
                // 只有这一条路返回
                return eventData;
            }
        } catch (ZkNoNodeException e) {
            logger.error("pipeline[{}] processId[{}] is invalid , retry again", pipelineId, processId);
            // /出现节点不存在，说明出现了error情况,递归调用重新获取一次
            return await(pipelineId);
        } catch (ZkException e) {
            throw new ArbitrateException("Select_await", e.getMessage(), e);
        }
    } else {
        logger.warn("pipelineId[{}] select ignore processId[{}] by status[{}]", new Object[] { pipelineId, processId, status });
        // add by ljh 2013-02-01
        // 遇到一个bug:
        // a. 某台机器发起了一个RESTART指令，然后开始删除process列表
        // b. 此时另一个台机器(select工作节点)，并没有收到PAUSE的推送，导致还会再创建一个process节点
        // c. 后续收到PAUSE指令后，丢弃了processId，就出现了unused的processId
        // 这里删除了，要考虑一个问题，就是和restart指令在并行删除同一个processId时的并发考虑，目前来看没问题
        String path = StagePathUtils.getProcess(pipelineId, processId);
        // 忽略删除失败
        zookeeper.delete(path);
        // 递归调用
        return await(pipelineId);
    }
}

Example 27 with ArbitrateException

use of com.alibaba.otter.shared.arbitrate.exception.ArbitrateException in project otter by alibaba.

the class ExtractZooKeeperArbitrateEvent method await.

// private TerminArbitrateEvent terminEvent;
/**
     * <pre>
     * 算法:
     * 1. 检查当前的Permit，阻塞等待其授权(解决Channel的pause状态处理)
     * 2. 开始阻塞获取符合条件的processId
     * 3. 检查当前的即时Permit状态 (在阻塞获取processId过程会出现一些error信号,process节点会被删除)
     * 4. 获取Select传递的EventData数据，添加next node信息后直接返回
     * </pre>
     * 
     * @return
     */
public EtlEventData await(Long pipelineId) throws InterruptedException {
    Assert.notNull(pipelineId);
    PermitMonitor permitMonitor = ArbitrateFactory.getInstance(pipelineId, PermitMonitor.class);
    // 阻塞等待授权
    permitMonitor.waitForPermit();
    ExtractStageListener extractStageListener = ArbitrateFactory.getInstance(pipelineId, ExtractStageListener.class);
    // 符合条件的processId
    Long processId = extractStageListener.waitForProcess();
    ChannelStatus status = permitMonitor.getChannelPermit();
    if (status.isStart()) {
        // 即时查询一下当前的状态，状态随时可能会变
        // 根据pipelineId+processId构造对应的path
        String path = StagePathUtils.getSelectStage(pipelineId, processId);
        try {
            byte[] data = zookeeper.readData(path);
            EtlEventData eventData = JsonUtils.unmarshalFromByte(data, EtlEventData.class);
            // 获取下一个处理节点信息
            Node node = LoadBalanceFactory.getNextTransformNode(pipelineId);
            if (node == null) {
                // terminEvent.single(termin);
                throw new ArbitrateException("Extract_single", "no next node");
            } else {
                eventData.setNextNid(node.getId());
                // 只有这一条路返回
                return eventData;
            }
        } catch (ZkNoNodeException e) {
            logger.error("pipeline[{}] processId[{}] is invalid , retry again", pipelineId, processId);
            // /出现节点不存在，说明出现了error情况,递归调用重新获取一次
            return await(pipelineId);
        } catch (ZkException e) {
            throw new ArbitrateException("Extract_await", e.getMessage(), e);
        }
    } else {
        logger.warn("pipelineId[{}] extract ignore processId[{}] by status[{}]", new Object[] { pipelineId, processId, status });
        // 递归调用
        return await(pipelineId);
    }
}

Example 28 with ArbitrateException

use of com.alibaba.otter.shared.arbitrate.exception.ArbitrateException in project otter by alibaba.

the class LoadZooKeeperArbitrateEvent method await.

// private Map<Long, DistributedLock> locks = new ConcurrentHashMap<Long, DistributedLock>();
/**
     * <pre>
     * 算法:
     * 1. 检查当前的Permit，阻塞等待其授权(解决Channel的pause状态处理)
     * 2. 开始阻塞获取符合条件的processId
     * 3. 检查当前的即时Permit状态 (在阻塞获取processId过程会出现一些error信号,process节点会被删除)
     * 4. 获取Select传递的EventData数据，添加next node信息后直接返回
     * </pre>
     */
public EtlEventData await(Long pipelineId) throws InterruptedException {
    Assert.notNull(pipelineId);
    PermitMonitor permitMonitor = ArbitrateFactory.getInstance(pipelineId, PermitMonitor.class);
    // 阻塞等待授权
    permitMonitor.waitForPermit();
    LoadStageListener loadStageListener = ArbitrateFactory.getInstance(pipelineId, LoadStageListener.class);
    // 符合条件的processId
    Long processId = loadStageListener.waitForProcess();
    // DistributedLock lock = getLock(pipelineId);
    try {
        // 使用锁的理由：
        // 1. 针对双向同步时，其中一个方向出现了异常，需要发起另一端的关闭，此时对方正好在执行某个process的load
        // 2. 单向同步时，如果出现node节点异常，此时正常的节点正在执行某个process的load
        // 为避免因load无法中端引起的数据重复录入，所以针对load阶段添加分布式锁。在有process load过程中不允许进行pipeline关闭操作
        // lock.lock();
        ChannelStatus status = permitMonitor.getChannelPermit();
        if (status.isStart()) {
            // 即时查询一下当前的状态，状态随时可能会变
            // 根据pipelineId+processId构造对应的path
            String path = StagePathUtils.getTransformStage(pipelineId, processId);
            try {
                byte[] data = zookeeper.readData(path);
                // 反序列化并返回
                return JsonUtils.unmarshalFromByte(data, EtlEventData.class);
            } catch (ZkNoNodeException e) {
                logger.error("pipeline[{}] processId[{}] is invalid , retry again", pipelineId, processId);
                // /出现节点不存在，说明出现了error情况,递归调用重新获取一次
                return await(pipelineId);
            } catch (ZkException e) {
                throw e;
            }
        } else {
            logger.warn("pipelineId[{}] load ignore processId[{}] by status[{}]", new Object[] { pipelineId, processId, status });
            // 出现rollback情况，递归调用重新获取一次，当前的processId可丢弃
            return await(pipelineId);
        }
    } catch (InterruptedException e) {
        throw e;
    } catch (Exception e) {
        throw new ArbitrateException(e);
    }
}

Example 29 with ArbitrateException

use of com.alibaba.otter.shared.arbitrate.exception.ArbitrateException in project otter by alibaba.

the class MainstemMonitor method single.

/**
     * 更新mainStem的同步状态数据
     */
public void single(MainStemEventData data) {
    Assert.notNull(data);
    Long nid = ArbitrateConfigUtils.getCurrentNid();
    if (!check()) {
        return;
    }
    // 设置当前的nid
    data.setNid(nid);
    String path = StagePathUtils.getMainStem(data.getPipelineId());
    // 初始化的数据对象
    byte[] bytes = JsonUtils.marshalToByte(data);
    try {
        zookeeper.writeData(path, bytes);
    } catch (ZkException e) {
        throw new ArbitrateException("mainStem_single", data.toString(), e);
    }
    activeData = data;
}

Example 30 with ArbitrateException

use of com.alibaba.otter.shared.arbitrate.exception.ArbitrateException in project otter by alibaba.

the class ChannelArbitrateEvent method updateStatus.

private void updateStatus(Long channelId, ChannelStatus status) {
    String path = ManagePathUtils.getChannelByChannelId(channelId);
    // 初始化的数据对象
    byte[] data = JsonUtils.marshalToByte(status);
    try {
        zookeeper.writeData(path, data);
    } catch (ZkException e) {
        throw new ArbitrateException("Channel_init", channelId.toString(), e);
    }
}