/**
* Executes a query.
*
* @param cmd HiveQL query to execute
*/
public void execute(String cmd) throws HiveServerException, TException {
HiveServerHandler.LOG.info("Running the query: " + cmd);
SessionState ss = SessionState.get();
String cmd_trimmed = cmd.trim();
String[] tokens = cmd_trimmed.split("\\s");
String cmd_1 = cmd_trimmed.substring(tokens[0].length()).trim();
int ret = 0;
try {
CommandProcessor proc = CommandProcessorFactory.get(tokens[0]);
if (proc != null) {
if (proc instanceof Driver) {
isHiveQuery = true;
ret = driver.run(cmd);
} else {
isHiveQuery = false;
ret = proc.run(cmd_1);
}
}
} catch (Exception e) {
throw new HiveServerException("Error running query: " + e.toString());
}
if (ret != 0) {
throw new HiveServerException("Query returned non-zero code: " + ret);
}
}
/** Return the status information about the Map-Reduce cluster */
public HiveClusterStatus getClusterStatus() throws HiveServerException, TException {
HiveClusterStatus hcs;
try {
ClusterStatus cs = driver.getClusterStatus();
JobTracker.State jbs = cs.getJobTrackerState();
// Convert the ClusterStatus to its Thrift equivalent: HiveClusterStatus
int state;
switch (jbs) {
case INITIALIZING:
state = JobTrackerState.INITIALIZING;
break;
case RUNNING:
state = JobTrackerState.RUNNING;
break;
default:
String errorMsg = "Unrecognized JobTracker state: " + jbs.toString();
throw new Exception(errorMsg);
}
hcs =
new HiveClusterStatus(
cs.getTaskTrackers(),
cs.getMapTasks(),
cs.getReduceTasks(),
cs.getMaxMapTasks(),
cs.getMaxReduceTasks(),
state);
} catch (Exception e) {
LOG.error(e.toString());
e.printStackTrace();
throw new HiveServerException("Unable to get cluster status: " + e.toString());
}
return hcs;
}
/** Return the Thrift schema of the query result */
public Schema getThriftSchema() throws HiveServerException, TException {
if (!isHiveQuery)
// Return empty schema if the last command was not a Hive query
return new Schema();
try {
Schema schema = driver.getThriftSchema();
if (schema == null) {
schema = new Schema();
}
LOG.info("Returning schema: " + schema);
return schema;
} catch (Exception e) {
LOG.error(e.toString());
e.printStackTrace();
throw new HiveServerException("Unable to get schema: " + e.toString());
}
}
public static void main(String[] args) {
try {
int port = 10000;
if (args.length >= 1) {
port = Integer.parseInt(args[0]);
}
TServerTransport serverTransport = new TServerSocket(port);
ThriftHiveProcessorFactory hfactory = new ThriftHiveProcessorFactory(null);
TThreadPoolServer.Options options = new TThreadPoolServer.Options();
TServer server =
new TThreadPoolServer(
hfactory,
serverTransport,
new TTransportFactory(),
new TTransportFactory(),
new TBinaryProtocol.Factory(),
new TBinaryProtocol.Factory(),
options);
HiveServerHandler.LOG.info("Starting hive server on port " + port);
server.serve();
} catch (Exception x) {
x.printStackTrace();
}
}
