Java ConnectionLossException类代码示例

import org.apache.zookeeper.KeeperException.ConnectionLossException; //导入依赖的package包/类
public void reconfigureInstance(String name, String params) throws NoAssignmentException, InterruptedException, KeeperException {
    if (LOG.isDebugEnabled()) {
        LOG.debug("Reconfiguring " + name + " with " + params);
    }
    Assigned assigned = instanceToAssignment.get(name);
    if (assigned == null) {
        throw new NoAssignmentException();
    }
    KeeperException lastException = null;
    for(int i = 0; i < maxTries; i++) {
        try {
            zk.setData(assignmentsNode + '/' + assigned.container + '/' + name, ("update " + params).getBytes(), -1);
            break;
        } catch (ConnectionLossException e) {
            lastException = e;
        }
    }
    if (lastException != null) {
        throw lastException;
    }
}
 

import org.apache.zookeeper.KeeperException.ConnectionLossException; //导入依赖的package包/类
/**
 * Ensure the client is able to talk to the server.
 * 
 * @param idx the idx of the server the client is talking to
 */
private void checkClientConnected(int idx) throws Exception {
    ZooKeeper zk = getClient(idx);
    if (zk == null) {
        return;
    }
    try {
        assertNull(zk.exists("/foofoofoo-connected", false));
    } catch (ConnectionLossException e) {
        // second chance...
        // in some cases, leader change in particular, the timing is
        // very tricky to get right in order to assure that the client has
        // disconnected and reconnected. In some cases the client will
        // disconnect, then attempt to reconnect before the server is
        // back, in which case we'll see another connloss on the operation
        // in the try, this catches that case and waits for the server
        // to come back
        PeerStruct peer = qu.getPeer(idx);
        Assert.assertTrue("Waiting for server down", ClientBase.waitForServerUp(
                "127.0.0.1:" + peer.clientPort, ClientBase.CONNECTION_TIMEOUT));

        assertNull(zk.exists("/foofoofoo-connected", false));
    }
}
 

import org.apache.zookeeper.KeeperException.ConnectionLossException; //导入依赖的package包/类
/**
 * Create the znodes, this may fail if the lower 32 roll over, if so
 * wait for the clients to be re-connected after the re-election
 */
private int createNodes(ZooKeeper zk, int start, int count) throws Exception {
    LOG.info("Creating nodes " + start + " thru " + (start + count));
    int j = 0;
    try {
        for (int i = start; i < start + count; i++) {
            zk.create("/foo" + i, new byte[0], Ids.READ_ACL_UNSAFE,
                    CreateMode.EPHEMERAL);
            j++;
        }
    } catch (ConnectionLossException e) {
        // this is ok - the leader has dropped leadership
        waitForClientsConnected();
    }
    return j;
}
 

import org.apache.zookeeper.KeeperException.ConnectionLossException; //导入依赖的package包/类
/**
 * Ensure the client is able to talk to the server.
 * 
 * @param idx the idx of the server the client is talking to
 */
private void checkClientConnected(int idx) throws Exception {
    ZooKeeper zk = getClient(idx);
    if (zk == null) {
        return;
    }
    try {
        Assert.assertNull(zk.exists("/foofoofoo-connected", false));
    } catch (ConnectionLossException e) {
        // second chance...
        // in some cases, leader change in particular, the timing is
        // very tricky to get right in order to assure that the client has
        // disconnected and reconnected. In some cases the client will
        // disconnect, then attempt to reconnect before the server is
        // back, in which case we'll see another connloss on the operation
        // in the try, this catches that case and waits for the server
        // to come back
        PeerStruct peer = qu.getPeer(idx);
        Assert.assertTrue("Waiting for server down", ClientBase.waitForServerUp(
                "127.0.0.1:" + peer.clientPort, ClientBase.CONNECTION_TIMEOUT));

        Assert.assertNull(zk.exists("/foofoofoo-connected", false));
    }
}
 

import org.apache.zookeeper.KeeperException.ConnectionLossException; //导入依赖的package包/类
/**
 * Create the znodes, this may fail if the lower 32 roll over, if so
 * wait for the clients to be re-connected after the re-election
 */
private int createNodes(ZooKeeper zk, int start, int count) throws Exception {
    LOG.info("Creating nodes {} thru {}", start, (start + count));
    int j = 0;
    try {
        for (int i = start; i < start + count; i++) {
            zk.create("/foo" + i, new byte[0], Ids.READ_ACL_UNSAFE,
                    CreateMode.EPHEMERAL);
            j++;
        }
    } catch (ConnectionLossException e) {
        // this is ok - the leader has dropped leadership
        waitForClientsConnected();
    }
    return j;
}
 

import org.apache.zookeeper.KeeperException.ConnectionLossException; //导入依赖的package包/类
public void start() {
    Preconditions.checkNotNull(nameSpace, "nameSpace can not be null");
    Preconditions.checkNotNull(zkurl, "zkurl can not be null");
    zkClient = RegisterHolder.getClient(zkurl);
    pathChildrenCache = new PathChildrenCache(zkClient, "/" + nameSpace, true);
    pathChildrenCache.getListenable().addListener(this);
    try {
        pathChildrenCache.start();
        initDataFromZk();
    } catch (Exception e) {
        // zookeeper cluster 不可用时,load the conf from localfile
        if (e instanceof ConnectionLossException) {
            logger.error(" ConnectionLossException has happen ,start to laod the local confFile to mem");
        }
    }

}
 

import org.apache.zookeeper.KeeperException.ConnectionLossException; //导入依赖的package包/类
/**
 * Create the znodes, this may fail if the lower 32 roll over, if so
 * wait for the clients to be re-connected after the re-election
 */
private int createNodes(ZooKeeper zk, int start, int count) throws Exception {
    LOG.info("Creating nodes " + start + " thru " + (start + count));
    int j = 0;
    try {
        for (int i = start; i < start + count; i++) {
            zk.create("/foo" + i, new byte[0], Ids.READ_ACL_UNSAFE,
                    CreateMode.EPHEMERAL);
            j++;
        }
    } catch (ConnectionLossException e) {
        // this is ok - the leader has dropped leadership
        waitForClients();
    }
    return j;
}