本文整理汇总了Java中org.apache.hadoop.hdfs.web.resources.ExceptionHandler类的典型用法代码示例。如果您正苦于以下问题：Java ExceptionHandler类的具体用法？Java ExceptionHandler怎么用？Java ExceptionHandler使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
ExceptionHandler类属于org.apache.hadoop.hdfs.web.resources包，在下文中一共展示了ExceptionHandler类的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: testClientFailoverWhenStandbyNNHasStaleCredentials
import org.apache.hadoop.hdfs.web.resources.ExceptionHandler; //导入依赖的package包/类
@Test
public void testClientFailoverWhenStandbyNNHasStaleCredentials()
throws IOException {
Configuration conf = DFSTestUtil.newHAConfiguration(LOGICAL_NAME);
conf.setBoolean(DFSConfigKeys
.DFS_NAMENODE_DELEGATION_TOKEN_ALWAYS_USE_KEY, true);
MiniDFSCluster cluster = null;
WebHdfsFileSystem fs = null;
try {
cluster = new MiniDFSCluster.Builder(conf).nnTopology(topo).numDataNodes(
0).build();
HATestUtil.setFailoverConfigurations(cluster, conf, LOGICAL_NAME);
cluster.waitActive();
fs = (WebHdfsFileSystem) FileSystem.get(WEBHDFS_URI, conf);
cluster.transitionToActive(0);
Token<?> token = fs.getDelegationToken(null);
final DelegationTokenIdentifier identifier = new DelegationTokenIdentifier();
identifier.readFields(
new DataInputStream(new ByteArrayInputStream(token.getIdentifier())));
cluster.transitionToStandby(0);
cluster.transitionToActive(1);
final DelegationTokenSecretManager secretManager = NameNodeAdapter.getDtSecretManager(
cluster.getNamesystem(0));
ExceptionHandler eh = new ExceptionHandler();
eh.initResponse(mock(HttpServletResponse.class));
Response resp = null;
try {
secretManager.retrievePassword(identifier);
} catch (IOException e) {
// Mimic the UserProvider class logic (server side) by throwing
// SecurityException here
Assert.assertTrue(e instanceof SecretManager.InvalidToken);
resp = eh.toResponse(new SecurityException(e));
}
// The Response (resp) below is what the server will send to client
//
// BEFORE HDFS-6475 fix, the resp.entity is
// {"RemoteException":{"exception":"SecurityException",
// "javaClassName":"java.lang.SecurityException",
// "message":"Failed to obtain user group information:
// org.apache.hadoop.security.token.SecretManager$InvalidToken:
// StandbyException"}}
// AFTER the fix, the resp.entity is
// {"RemoteException":{"exception":"StandbyException",
// "javaClassName":"org.apache.hadoop.ipc.StandbyException",
// "message":"Operation category READ is not supported in
// state standby"}}
//
// Mimic the client side logic by parsing the response from server
//
Map<?, ?> m = (Map<?, ?>) JSON.parse(resp.getEntity().toString());
RemoteException re = JsonUtilClient.toRemoteException(m);
Exception unwrapped = re.unwrapRemoteException(StandbyException.class);
Assert.assertTrue(unwrapped instanceof StandbyException);
} finally {
IOUtils.cleanup(null, fs);
if (cluster != null) {
cluster.shutdown();
}
}
}