Example usage for java.util.concurrent ArrayBlockingQueue isEmpty

Introduction

In this page you can find the example usage for java.util.concurrent ArrayBlockingQueue isEmpty.

Prototype

boolean isEmpty();

Source Link

Document

Returns true if this collection contains no elements.

Usage

From source file:org.kchine.rpf.db.MainNodeManager.java

private static void createTask() {
    try {/* w w  w  .j  ava  2  s. c  o m*/
        System.out.println(" create worker round at " + new Date());
        long T1 = System.currentTimeMillis();

        final ArrayBlockingQueue<String> indexesQueue = new ArrayBlockingQueue<String>(200);

        Vector<NodeDataDB> nodes = _registry.getNodeData("");
        for (int i = 0; i < nodes.size(); ++i) {
            final String nodeName = nodes.elementAt(i).getNodeName();
            String nodeIp = nodes.elementAt(i).getHostIp();
            String nodePrefix = nodes.elementAt(i).getPoolPrefix();

            Vector<HashMap<String, Object>> servants = _registry.getTableData("SERVANTS", "NODE_NAME='"
                    + nodeName + "'" + " OR (HOST_IP='" + nodeIp + "' AND NAME like '" + nodePrefix + "%')");

            final int missing = nodes.elementAt(i).getServantNbrMin() - servants.size();
            if (missing > 0) {
                System.out.println("Node<" + nodeName + "> missing :" + missing);
                for (int j = 0; j < missing; ++j) {
                    indexesQueue.add(nodeName);
                }
            }
        }

        Thread[] t = new Thread[10];
        for (int i = 0; i < t.length; ++i) {
            t[i] = new Thread(new Runnable() {
                public void run() {

                    while (true) {

                        if (indexesQueue.isEmpty())
                            break;
                        try {
                            if (_nodeData == null) {
                                if (!indexesQueue.isEmpty()) {
                                    String nodeName = indexesQueue.poll();
                                    if (nodeName != null) {
                                        try {
                                            _registry.lookup(
                                                    System.getProperty("node.manager.name") + '_' + nodeName);
                                        } catch (NotBoundException nbe) {
                                            NodeManager _manager = (NodeManager) _registry
                                                    .lookup(System.getProperty("node.manager.name"));
                                            ManagedServant ms = _manager.createServant(nodeName);
                                            System.out.println(ms + "  successfully created");
                                        }
                                    }
                                }
                            } else {

                                if (!indexesQueue.isEmpty()) {
                                    String nodeName = indexesQueue.poll();
                                    if (nodeName != null && nodeName.equals(_nodeData.getNodeName())) {
                                        NodeManager _manager = (NodeManager) _registry.lookup(_nodeManagerName);
                                        ManagedServant ms = _manager.createServant(nodeName);
                                        System.out.println(ms + "  successfully created");
                                    }
                                }

                            }

                        } catch (Exception e) {
                            e.printStackTrace();
                        } finally {
                            try {
                                Thread.sleep(500);
                            } catch (Exception e) {
                            }
                        }
                    }

                }
            });

            t[i].start();

        }

        for (int i = 0; i < t.length; ++i) {
            t[i].join();
        }

        System.out
                .println("Last create servants round took :" + (System.currentTimeMillis() - T1) + " millisec");
    } catch (Exception e) {
        e.printStackTrace();
    }
}

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