@Override
public void delete(String path) {
try {
client.delete(path);
} catch (ZkNoNodeException e) {
}
}
@SuppressWarnings("unchecked")
public T poll() throws Exception {
try {
List<String> list = zkClient.getChildren(root);
if (list.size() == 0) {
return null;
}
Collections.sort(
list,
new Comparator<String>() {
public int compare(String lhs, String rhs) {
return getNodeNumber(lhs, Node_NAME).compareTo(getNodeNumber(rhs, Node_NAME));
}
});
for (String nodeName : list) {
String nodeFullPath = root.concat("/").concat(nodeName);
try {
T node = (T) zkClient.readData(nodeFullPath);
zkClient.delete(nodeFullPath);
return node;
} catch (ZkNoNodeException e) {
// ignore
}
}
return null;
} catch (Exception e) {
throw ExceptionUtil.convertToRuntimeException(e);
}
}
@Export
public void clean() {
List<String> groups = zkClient.getChildren(ZkPaths.rootPath());
for (String group : groups) {
if (zkClient.countChildren(ZkPaths.groupPath(group)) == 0) {
zkClient.delete(ZkPaths.groupPath(group));
}
}
}
/** 使用正确的密码删除节点 */
static void deleteParent() throws Exception {
try {
zkClient = new ZkClient(SERVER_LIST, 50000);
// zkClient.addAuthInfo(authentication_type, correctAuthentication.getBytes());
if (zkClient.exists(PATH)) {
zkClient.delete(PATH);
System.out.println(PATH + "删除成功");
}
} catch (Exception e) {
e.printStackTrace();
}
}
/** 不使用密码 删除节点 */
static void deleteNodeByNoAuthentication() throws Exception {
String prefix = "[不使用任何授权信息]";
try {
System.out.println(prefix + "删除节点：" + PATH_DEL);
zkClient = new ZkClient(SERVER_LIST, 50000);
if (zkClient.exists(PATH_DEL)) {
zkClient.delete(PATH_DEL);
System.out.println(prefix + "删除成功");
}
} catch (Exception e) {
System.err.println(prefix + "删除失败，原因是：" + e.getMessage());
}
}
/** 使用正确的密码删除节点 */
static void deleteNodeByCorrectAuthentication() throws Exception {
String prefix = "[使用正确的授权信息]";
try {
System.out.println(prefix + "删除节点：" + PATH_DEL);
zkClient = new ZkClient(SERVER_LIST, 50000);
// zkClient.addAuthInfo(authentication_type, correctAuthentication.getBytes());
if (zkClient.exists(PATH_DEL)) {
zkClient.delete(PATH_DEL);
System.out.println(prefix + "删除成功");
}
} catch (Exception e) {
System.out.println(prefix + "删除失败，原因是：" + e.getMessage());
}
}
public T dequeue() throws InterruptedException {
if (_isBlocking) {
Element<T> element = getFirstElement();
_zkClient.delete(getElementPath(element.getName()));
return element.getData();
} else {
throw new UnsupportedOperationException("Non-blocking ZooKeeperQueue is not yet supported");
/* FIXME DOES NOT WORK
try {
String headName = getSmallestElement(_zkClient.getChildren(_elementsPath));
String headPath = getElementPath(headName);
return (T) _zkClient.readData(headPath);
} catch (ZkNoNodeException e) {
return null;
}
*/
}
}
public static void delete(String path) {
zkClient.delete(path);
}
