| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| #ifndef IMPALA_EXEC_HBASE_TABLE_WRITER_H |
| #define IMPALA_EXEC_HBASE_TABLE_WRITER_H |
| |
| #include <jni.h> |
| #include <boost/thread.hpp> |
| #include <boost/scoped_ptr.hpp> |
| #include <vector> |
| #include <string> |
| #include <utility> |
| |
| #include "common/status.h" |
| #include "runtime/runtime-state.h" |
| #include "runtime/descriptors.h" |
| #include "runtime/hbase-table.h" |
| |
| namespace impala { |
| |
| class RowBatch; |
| |
| /// Class to write RowBatches to an HBase table using the java HTable client. |
| /// This class should only be called from a single sink and should not be |
| /// shared. |
| /// Sample usage (Must happen in order): |
| /// HBaseTableWriter::InitJni(); |
| /// writer = new HBaseTableWriter(state, table_desc_, output_exprs_); |
| /// writer.Init(state); |
| /// writer.AppendRows(batch); |
| class HBaseTableWriter { |
| public: |
| HBaseTableWriter(HBaseTableDescriptor* table_desc, |
| const std::vector<ScalarExprEvaluator*>& output_expr_evals, |
| RuntimeProfile* profile); |
| Status AppendRows(RowBatch* batch); |
| |
| /// Calls to Close release the HBaseTable. |
| void Close(RuntimeState* state); |
| |
| /// Create all needed java side objects. |
| /// This call may cause connections to HBase and Zookeeper to be created. |
| Status Init(RuntimeState* state); |
| |
| /// Grab all of the Java classes needed to get data into and out of HBase. |
| static Status InitJNI(); |
| |
| private: |
| /// Methods used to create JNI objects. |
| /// Create a Put using the supplied row key |
| Status CreatePut(JNIEnv* env, const void* rk, int rk_len, jobject* put); |
| |
| /// Create a byte array containing the string's chars. |
| Status CreateByteArray(JNIEnv* env, const std::string& s, |
| jbyteArray* j_array); |
| |
| /// Create a byte array containing the input bytes. |
| Status CreateByteArray(JNIEnv* env, const void* data, int data_len, |
| jbyteArray* j_array); |
| |
| /// Create an ArrayList<Put> to be passed to put.put(list); |
| /// Should be used like: |
| /// CreatePutList(env, limit); |
| Status CreatePutList(JNIEnv* env, int num_puts); |
| |
| /// Clean up the jni global ref in put_list_, allowing the jni to garbage |
| /// collect all of the puts that are created by a writer. |
| Status CleanUpJni(); |
| |
| /// Owned by RuntimeState not by this object |
| HBaseTableDescriptor* table_desc_; |
| |
| /// The wrapper around a Java HTable. |
| /// This instance is owned by this object and must be cleaned |
| /// up using close before the table can be discarded. |
| boost::scoped_ptr<HBaseTable> table_; |
| |
| /// Contains the byte size of output_expr_evals_[i]->root()'s type. |
| std::vector<int> output_exprs_byte_sizes_; |
| |
| /// Reference to the evaluators of expressions which generate the output value. |
| /// The evaluators are owned by the sink which owns this table writer. |
| const std::vector<ScalarExprEvaluator*>& output_expr_evals_; |
| |
| /// jni ArrayList<Put> |
| jobject put_list_; |
| |
| /// org.apache.hadoop.hbase.client.Put |
| static jclass put_cl_; |
| |
| /// new Put(byte[]) |
| static jmethodID put_ctor_; |
| |
| /// Put#addColumn(byte[], byte[], byte[]) |
| static jmethodID put_addcolumn_id_; |
| |
| /// java.util.ArrayList |
| static jclass list_cl_; |
| |
| /// new ArrayList<V>(starting_capacity) |
| static jmethodID list_ctor_; |
| |
| /// ArrayList#add(V); |
| static jmethodID list_add_id_; |
| |
| /// cf_arrays_[i-1] is the column family jbyteArray for column i. |
| std::vector<jbyteArray> cf_arrays_; |
| |
| /// qual_arrays_[i-1] is the column family qualifier jbyteArray for column i. |
| std::vector<jbyteArray> qual_arrays_; |
| |
| /// Parent table sink's profile |
| RuntimeProfile* runtime_profile_; |
| RuntimeProfile::Counter* encoding_timer_; |
| RuntimeProfile::Counter* htable_put_timer_; |
| }; |
| |
| } // namespace impala |
| #endif |