本文整理了Java中org.apache.hadoop.hbase.client.Admin.listNamespaceDescriptors()方法的一些代码示例，展示了Admin.listNamespaceDescriptors()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Admin.listNamespaceDescriptors()方法的具体详情如下：
包路径：org.apache.hadoop.hbase.client.Admin
类名称：Admin
方法名：listNamespaceDescriptors

Admin.listNamespaceDescriptors介绍

[英]List available namespace descriptors
[中]列出可用的命名空间描述符

代码示例

代码示例来源：origin: apache/hbase

/**
 * Constructor
 * @param admin the administrative API
 * @throws IOException
 */
public NamespacesModel(Admin admin) throws IOException {
 NamespaceDescriptor[] nds = admin.listNamespaceDescriptors();
 namespaces = new ArrayList<>(nds.length);
 for (NamespaceDescriptor nd : nds) {
  namespaces.add(nd.getName());
 }
}

代码示例来源：origin: apache/hbase

private boolean doesNamespaceExist(Admin admin, String namespaceName) throws IOException{
 NamespaceDescriptor[] nd = admin.listNamespaceDescriptors();
 for(int i = 0; i < nd.length; i++){
  if(nd[i].getName().equals(namespaceName)){
   return true;
  }
 }
 return false;
}

代码示例来源：origin: apache/hbase

private NamespaceDescriptor findNamespace(Admin admin, String namespaceName) throws IOException{
 NamespaceDescriptor[] nd = admin.listNamespaceDescriptors();
 for(int i = 0; i < nd.length; i++){
  if(nd[i].getName().equals(namespaceName)){
   return nd[i];
  }
 }
 return null;
}

代码示例来源：origin: apache/hbase

private boolean doesNamespaceExist(Admin admin, String namespaceName) throws IOException {
 NamespaceDescriptor[] nd = admin.listNamespaceDescriptors();
 for(int i = 0; i < nd.length; i++) {
  if(nd[i].getName().equals(namespaceName)) {
   return true;
  }
 }
 return false;
}

代码示例来源：origin: apache/hbase

@Override
 public List<TNamespaceDescriptor> listNamespaceDescriptors() throws TIOError, TException {
  try {
   NamespaceDescriptor[] descriptors = connectionCache.getAdmin().listNamespaceDescriptors();
   return namespaceDescriptorsFromHBase(descriptors);
  } catch (IOException e) {
   throw getTIOError(e);
  }
 }
}

代码示例来源：origin: apache/hbase

public boolean namespaceExists(String ns) throws IOException {
 NamespaceDescriptor[] descs = TEST_UTIL.getAdmin().listNamespaceDescriptors();
 for (NamespaceDescriptor desc : descs) {
  if (ns.equals(desc.getName())) {
   return true;
  }
 }
 return false;
}

代码示例来源：origin: apache/hbase

} else if (tableRegex.charAt(0) == '@') { // Namespaces
 String namespaceRegex = tableRegex.substring(1);
 for (NamespaceDescriptor nsds : admin.listNamespaceDescriptors()) { // Read out all

代码示例来源：origin: apache/hbase

private void verifyNamespaceExists(Admin admin) throws IOException {
 String namespaceName = tableName.getNamespaceAsString();
 NamespaceDescriptor ns = NamespaceDescriptor.create(namespaceName).build();
 NamespaceDescriptor[] list = admin.listNamespaceDescriptors();
 boolean exists = false;
 for (NamespaceDescriptor nsd : list) {
  if (nsd.getName().equals(ns.getName())) {
   exists = true;
   break;
  }
 }
 if (!exists) {
  admin.createNamespace(ns);
 }
}

代码示例来源：origin: apache/hbase

public void deleteNamespaceIfNecessary() throws IOException {
 for (NamespaceDescriptor desc : TEST_UTIL.getAdmin().listNamespaceDescriptors()) {
  if(desc.getName().startsWith(tablePrefix)) {
   admin.deleteNamespace(desc.getName());
  }
 }
}

代码示例来源：origin: apache/hbase

@Test(expected = QuotaExceededException.class)
public void testExceedTableQuotaInNamespace() throws Exception {
 String nsp = prefix + "_testExceedTableQuotaInNamespace";
 NamespaceDescriptor nspDesc =
   NamespaceDescriptor.create(nsp).addConfiguration(TableNamespaceManager.KEY_MAX_TABLES, "1")
     .build();
 ADMIN.createNamespace(nspDesc);
 assertNotNull("Namespace descriptor found null.", ADMIN.getNamespaceDescriptor(nsp));
 assertEquals(3, ADMIN.listNamespaceDescriptors().length);
 HColumnDescriptor fam1 = new HColumnDescriptor("fam1");
 HTableDescriptor tableDescOne =
   new HTableDescriptor(TableName.valueOf(nsp + TableName.NAMESPACE_DELIM + "table1"));
 tableDescOne.addFamily(fam1);
 HTableDescriptor tableDescTwo =
   new HTableDescriptor(TableName.valueOf(nsp + TableName.NAMESPACE_DELIM + "table2"));
 tableDescTwo.addFamily(fam1);
 ADMIN.createTable(tableDescOne);
 ADMIN.createTable(tableDescTwo, Bytes.toBytes("AAA"), Bytes.toBytes("ZZZ"), 4);
}

代码示例来源：origin: apache/hbase

@Override
 public Object run() throws Exception {
  Connection unmanagedConnection =
    ConnectionFactory.createConnection(UTIL.getConfiguration());
  Admin admin = unmanagedConnection.getAdmin();
  try {
   return Arrays.asList(admin.listNamespaceDescriptors());
  } finally {
   admin.close();
   unmanagedConnection.close();
  }
 }
};

代码示例来源：origin: apache/hbase

@Test
public void createRemoveTest() throws Exception {
 String nsName = prefix + "_" + name.getMethodName();
 LOG.info(name.getMethodName());
 //create namespace and verify
 admin.createNamespace(NamespaceDescriptor.create(nsName).build());
 assertEquals(3, admin.listNamespaceDescriptors().length);
 //remove namespace and verify
 admin.deleteNamespace(nsName);
 assertEquals(2, admin.listNamespaceDescriptors().length);
}

代码示例来源：origin: apache/hbase

@Override
public void cleanUpCluster() throws Exception {
 if (!keepObjectsAtTheEnd) {
  Admin admin = util.getAdmin();
  admin.disableTables("ittable-\\d+");
  admin.deleteTables("ittable-\\d+");
  NamespaceDescriptor [] nsds = admin.listNamespaceDescriptors();
  for(NamespaceDescriptor nsd: nsds) {
   if(nsd.getName().matches("itnamespace\\d+")) {
    LOG.info("Removing namespace="+nsd.getName());
    admin.deleteNamespace(nsd.getName());
   }
  }
 }
 enabledTables.clear();
 disabledTables.clear();
 deletedTables.clear();
 namespaceMap.clear();
 Connection connection = getConnection();
 connection.close();
 super.cleanUpCluster();
}

代码示例来源：origin: apache/hbase

@Before
public void beforeMethod() throws IOException {
 for (HTableDescriptor desc : admin.listTables(prefix+".*")) {
  admin.disableTable(desc.getTableName());
  admin.deleteTable(desc.getTableName());
 }
 for (NamespaceDescriptor ns : admin.listNamespaceDescriptors()) {
  if (ns.getName().startsWith(prefix)) {
   admin.deleteNamespace(ns.getName());
  }
 }
}

代码示例来源：origin: apache/hbase

ADMIN.createNamespace(nspDesc);
assertNotNull("Namespace descriptor found null.", ADMIN.getNamespaceDescriptor(nsp));
assertEquals(3, ADMIN.listNamespaceDescriptors().length);
HColumnDescriptor fam1 = new HColumnDescriptor("fam1");

代码示例来源：origin: apache/hbase

@After
public void cleanup() throws Exception, KeeperException {
 for (HTableDescriptor table : ADMIN.listTables()) {
  ADMIN.disableTable(table.getTableName());
  deleteTable(table.getTableName());
 }
 for (NamespaceDescriptor ns : ADMIN.listNamespaceDescriptors()) {
  if (ns.getName().startsWith(prefix)) {
   ADMIN.deleteNamespace(ns.getName());
  }
 }
 assertTrue("Quota manager not initialized", UTIL.getHBaseCluster().getMaster()
   .getMasterQuotaManager().isQuotaInitialized());
}

代码示例来源：origin: apache/hbase

.addConfiguration(TableNamespaceManager.KEY_MAX_TABLES, "2").build();
admin.createNamespace(nspDesc);
assertEquals(3, admin.listNamespaceDescriptors().length);
ColumnFamilyDescriptor fam1 = ColumnFamilyDescriptorBuilder.of("fam1");
TableDescriptor tableDescOne = TableDescriptorBuilder

代码示例来源：origin: apache/hbase

assertEquals(ns.getName(), NamespaceDescriptor.SYSTEM_NAMESPACE.getName());
assertEquals(2, admin.listNamespaceDescriptors().length);

代码示例来源：origin: apache/hbase

UTIL.getMiniHBaseCluster().startMaster();
assertEquals(7, UTIL.getAdmin().listNamespaceDescriptors().length);
for (int i = 0; i < 5; i++) {
 NamespaceDescriptor nd = UTIL.getAdmin().getNamespaceDescriptor("Test-NS-" + i);
assertEquals(7, UTIL.getAdmin().listNamespaceDescriptors().length);

代码示例来源：origin: apache/hbase

admin.createNamespace(namespaceDescriptor);
NamespaceDescriptor[] namespaceDescriptors = admin.listNamespaceDescriptors();
boolean found = false;
for (NamespaceDescriptor nd : namespaceDescriptors) {
namespaceDescriptors = admin.listNamespaceDescriptors();