Java MultiTransactionRecord类代码示例

import org.apache.zookeeper.MultiTransactionRecord; //导入依赖的package包/类
/**
 * Grab current pending change records for each op in a multi-op.
 * 
 * This is used inside MultiOp error code path to rollback in the event
 * of a failed multi-op.
 *
 * @param multiRequest
 */
HashMap<String, ChangeRecord> getPendingChanges(MultiTransactionRecord multiRequest) {
	HashMap<String, ChangeRecord> pendingChangeRecords = new HashMap<String, ChangeRecord>();
	
    for(Op op: multiRequest) {
		String path = op.getPath();

		try {
			ChangeRecord cr = getRecordForPath(path);
			if (cr != null) {
				pendingChangeRecords.put(path, cr);
			}
		} catch (KeeperException.NoNodeException e) {
			// ignore this one
		}
	}
    
    return pendingChangeRecords;
}
 

import org.apache.zookeeper.MultiTransactionRecord; //导入依赖的package包/类
/**
 * Grab current pending change records for each op in a multi-op.
 * 
 * This is used inside MultiOp error code path to rollback in the event
 * of a failed multi-op.
 *
 * @param multiRequest
 * @return a map that contains previously existed records that probably need to be
 *         rolled back in any failure.
 */
HashMap<String, ChangeRecord> getPendingChanges(MultiTransactionRecord multiRequest) {
    HashMap<String, ChangeRecord> pendingChangeRecords = new HashMap<String, ChangeRecord>();

    for (Op op : multiRequest) {
        String path = op.getPath();
        ChangeRecord cr = getOutstandingChange(path);
        // only previously existing records need to be rolled back.
        if (cr != null) {
            pendingChangeRecords.put(path, cr);
        }

        /*
         * ZOOKEEPER-1624 - We need to store for parent's ChangeRecord
         * of the parent node of a request. So that if this is a
         * sequential node creation request, rollbackPendingChanges()
         * can restore previous parent's ChangeRecord correctly.
         *
         * Otherwise, sequential node name generation will be incorrect
         * for a subsequent request.
         */
        int lastSlash = path.lastIndexOf('/');
        if (lastSlash == -1 || path.indexOf('\0') != -1) {
            continue;
        }
        String parentPath = path.substring(0, lastSlash);
        ChangeRecord parentCr = getOutstandingChange(parentPath);
        if (parentCr != null) {
            pendingChangeRecords.put(parentPath, parentCr);
        }
    }

    return pendingChangeRecords;
}
 

import org.apache.zookeeper.MultiTransactionRecord; //导入依赖的package包/类
private void process(List<Op> ops) throws Exception {
    pLatch = new CountDownLatch(1);
    processor = new PrepRequestProcessor(zks, new MyRequestProcessor());

    Record record = new MultiTransactionRecord(ops);
    Request req = createRequest(record, OpCode.multi);

    processor.pRequest(req);
    Assert.assertTrue("request hasn't been processed in chain", pLatch.await(5, TimeUnit.SECONDS));
}
 

import org.apache.zookeeper.MultiTransactionRecord; //导入依赖的package包/类
/**
 * Grab current pending change records for each op in a multi-op.
 *
 * This is used inside MultiOp error code path to rollback in the event
 * of a failed multi-op.
 *
 * @param multiRequest
 * @return a map that contains previously existed records that probably need to be
 *         rolled back in any failure.
 */
private Map<String, ChangeRecord> getPendingChanges(MultiTransactionRecord multiRequest) {
    Map<String, ChangeRecord> pendingChangeRecords = new HashMap<String, ChangeRecord>();

    for (Op op : multiRequest) {
        String path = op.getPath();
        ChangeRecord cr = getOutstandingChange(path);
        // only previously existing records need to be rolled back.
        if (cr != null) {
            pendingChangeRecords.put(path, cr);
        }

        /*
         * ZOOKEEPER-1624 - We need to store for parent's ChangeRecord
         * of the parent node of a request. So that if this is a
         * sequential node creation request, rollbackPendingChanges()
         * can restore previous parent's ChangeRecord correctly.
         *
         * Otherwise, sequential node name generation will be incorrect
         * for a subsequent request.
         */
        int lastSlash = path.lastIndexOf('/');
        if (lastSlash == -1 || path.indexOf('\0') != -1) {
            continue;
        }
        String parentPath = path.substring(0, lastSlash);
        ChangeRecord parentCr = getOutstandingChange(parentPath);
        if (parentCr != null) {
            pendingChangeRecords.put(parentPath, parentCr);
        }
    }

    return pendingChangeRecords;
}
 

import org.apache.zookeeper.MultiTransactionRecord; //导入依赖的package包/类
/**
 * Grab current pending change records for each op in a multi-op.
 *
 * This is used inside MultiOp error code path to rollback in the event
 * of a failed multi-op.
 *
 * @param multiRequest
 * @return a map that contains previously existed records that probably need to be
 *         rolled back in any failure.
 */
private Map<String, ChangeRecord> getPendingChanges(MultiTransactionRecord multiRequest) {
    HashMap<String, ChangeRecord> pendingChangeRecords = new HashMap<String, ChangeRecord>();

    for (Op op : multiRequest) {
        String path = op.getPath();
        ChangeRecord cr = getOutstandingChange(path);
        // only previously existing records need to be rolled back.
        if (cr != null) {
            pendingChangeRecords.put(path, cr);
        }

        /*
         * ZOOKEEPER-1624 - We need to store for parent's ChangeRecord
         * of the parent node of a request. So that if this is a
         * sequential node creation request, rollbackPendingChanges()
         * can restore previous parent's ChangeRecord correctly.
         *
         * Otherwise, sequential node name generation will be incorrect
         * for a subsequent request.
         */
        int lastSlash = path.lastIndexOf('/');
        if (lastSlash == -1 || path.indexOf('\0') != -1) {
            continue;
        }
        String parentPath = path.substring(0, lastSlash);
        ChangeRecord parentCr = getOutstandingChange(parentPath);
        if (parentCr != null) {
            pendingChangeRecords.put(parentPath, parentCr);
        }
    }

    return pendingChangeRecords;
}
 

import org.apache.zookeeper.MultiTransactionRecord; //导入依赖的package包/类
/**
 * Grab current pending change records for each op in a multi-op.
 * 
 * This is used inside MultiOp error code path to rollback in the event
 * of a failed multi-op.
 *
 * @param multiRequest
 */
HashMap<String, ChangeRecord> getPendingChanges(MultiTransactionRecord multiRequest) {
	HashMap<String, ChangeRecord> pendingChangeRecords = new HashMap<String, ChangeRecord>();
	
    for(Op op: multiRequest) {
		String path = op.getPath();

		try {
		    ChangeRecord cr = getRecordForPath(path);
		    if (cr != null) {
		        pendingChangeRecords.put(path, cr);
		    }
		    /*
		     * ZOOKEEPER-1624 - We need to store for parent's ChangeRecord
		     * of the parent node of a request. So that if this is a
		     * sequential node creation request, rollbackPendingChanges()
		     * can restore previous parent's ChangeRecord correctly.
		     *
		     * Otherwise, sequential node name generation will be incorrect
		     * for a subsequent request.
		     */
		    int lastSlash = path.lastIndexOf('/');
		    if (lastSlash == -1 || path.indexOf('\0') != -1) {
		        continue;
		    }
		    String parentPath = path.substring(0, lastSlash);
		    ChangeRecord parentCr = getRecordForPath(parentPath);
		    if (parentCr != null) {
		        pendingChangeRecords.put(parentPath, parentCr);
		    }
		} catch (KeeperException.NoNodeException e) {
			// ignore this one
		}
	}
    
    return pendingChangeRecords;
}