Example usage for org.apache.zookeeper.recipes.lock ZooKeeperOperation execute

Introduction

In this page you can find the example usage for org.apache.zookeeper.recipes.lock ZooKeeperOperation execute.

Prototype

boolean execute() throws KeeperException, InterruptedException;

Source Link

Document

Performs the operation - which may be involved multiple times if the connection to ZooKeeper closes during this operation.

Usage

From source file:com.zookeeper.lyt.lock.ProtocolSupport.java

License:Apache License

/**
 * Perform the given operation, retrying if the connection fails
 * @return object. it needs to be cast to the callee's expected 
 * return type./*from   ww  w .j ava2 s  . c  o  m*/
 */
protected Object retryOperation(ZooKeeperOperation operation) throws KeeperException, InterruptedException {
    KeeperException exception = null;
    for (int i = 0; i < retryCount; i++) {
        try {
            return operation.execute();
        } catch (KeeperException.SessionExpiredException e) {
            LOG.warn("Session expired for: " + zookeeper + " so reconnecting due to: " + e, e);
            throw e;
        } catch (KeeperException.ConnectionLossException e) {
            if (exception == null) {
                exception = e;
            }
            LOG.debug("Attempt " + i + " failed with connection loss so " + "attempting to reconnect: " + e, e);
            retryDelay(i);
        }
    }
    throw exception;
}

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