public static byte[] encodeIteratorSettings(IteratorConfig iterators) {
TSerializer tser = new TSerializer(new TBinaryProtocol.Factory());
try {
return tser.serialize(iterators);
} catch (TException e) {
throw new RuntimeException(e);
}
}
private static String thriftToString(TBase object) {
assert object != null;
// this is so awful it's kind of cool!
TSerializer serializer = new TSerializer(new TBinaryProtocol.Factory());
try {
return Hex.bytesToHex(serializer.serialize(object));
} catch (TException e) {
throw new RuntimeException(e);
}
}
/** Executes a HiveServer2 metadata operation and returns a TMetadataOpResponse */
public byte[] execHiveServer2MetadataOp(byte[] metadataOpsParams) throws ImpalaException {
TMetadataOpRequest params = new TMetadataOpRequest();
deserializeThrift(params, metadataOpsParams);
TMetadataOpResponse result = frontend.execHiveServer2MetadataOp(params);
TSerializer serializer = new TSerializer(protocolFactory);
try {
return serializer.serialize(result);
} catch (TException e) {
throw new InternalException(e.getMessage());
}
}
/**
* Returns a list of the columns making up a table. The argument is a serialized
* TDescribeTableParams object. The return type is a serialised TDescribeTableResult object.
*
* @see Frontend#describeTable
*/
public byte[] describeTable(byte[] thriftDescribeTableParams) throws ImpalaException {
TDescribeTableParams params = new TDescribeTableParams();
deserializeThrift(params, thriftDescribeTableParams);
TDescribeTableResult result = new TDescribeTableResult();
result.setColumns(frontend.describeTable(params.getDb(), params.getTable_name()));
TSerializer serializer = new TSerializer(protocolFactory);
try {
return serializer.serialize(result);
} catch (TException e) {
throw new InternalException(e.getMessage());
}
}
/**
* Returns a list of table names matching an optional pattern. The argument is a serialized
* TGetTablesParams object. The return type is a serialised TGetTablesResult object.
*
* @see Frontend#getTableNames
*/
public byte[] getDbNames(byte[] thriftGetTablesParams) throws ImpalaException {
TGetDbsParams params = new TGetDbsParams();
deserializeThrift(params, thriftGetTablesParams);
List<String> dbs = frontend.getDbNames(params.pattern);
TGetDbsResult result = new TGetDbsResult();
result.setDbs(dbs);
TSerializer serializer = new TSerializer(protocolFactory);
try {
return serializer.serialize(result);
} catch (TException e) {
throw new InternalException(e.getMessage());
}
}
/**
* Jni wrapper for Frontend.createQueryExecRequest2(). Accepts a serialized TClientRequest;
* returns a serialized TQueryExecRequest2.
*/
public byte[] createExecRequest(byte[] thriftClientRequest) throws ImpalaException {
TClientRequest request = new TClientRequest();
deserializeThrift(request, thriftClientRequest);
StringBuilder explainString = new StringBuilder();
TExecRequest result = frontend.createExecRequest(request, explainString);
LOG.info(explainString.toString());
// LOG.info("returned TQueryExecRequest2: " + result.toString());
// TODO: avoid creating serializer for each query?
TSerializer serializer = new TSerializer(protocolFactory);
try {
return serializer.serialize(result);
} catch (TException e) {
throw new InternalException(e.getMessage());
}
}
public static byte[] serialize(HostConfig config) throws Exception {
TSerializer serializer = new TSerializer();
return serializer.serialize(config);
}
