Gabriel39 commented on code in PR #9930: URL: https://github.com/apache/incubator-doris/pull/9930#discussion_r890852003
########## be/src/vec/aggregate_functions/aggregate_function_java_udaf.h: ########## @@ -0,0 +1,363 @@ +// 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. + +#pragma once + +#ifdef LIBJVM + +#include <jni.h> +#include <unistd.h> + +#include <cstdint> +#include <memory> + +#include "common/status.h" +#include "gen_cpp/Exprs_types.h" +#include "runtime/user_function_cache.h" +#include "util/jni-util.h" +#include "vec/aggregate_functions/aggregate_function.h" +#include "vec/columns/column_string.h" +#include "vec/common/exception.h" +#include "vec/common/string_ref.h" +#include "vec/core/block.h" +#include "vec/core/column_numbers.h" +#include "vec/core/field.h" +#include "vec/core/types.h" +#include "vec/data_types/data_type_string.h" +#include "vec/io/io_helper.h" + +namespace doris::vectorized { + +const char* UDAF_EXECUTOR_CLASS = "org/apache/doris/udf/UdafExecutor"; +const char* UDAF_EXECUTOR_CTOR_SIGNATURE = "([B)V"; +const char* UDAF_EXECUTOR_CLOSE_SIGNATURE = "()V"; +const char* UDAF_EXECUTOR_ADD_SIGNATURE = "(JJ)V"; +const char* UDAF_EXECUTOR_SERIALIZE_SIGNATURE = "(Ljava/lang/Object;)V"; +const char* UDAF_EXECUTOR_MERGE_SIGNATURE = "(Ljava/lang/Object;)V"; +const char* UDAF_EXECUTOR_RESULT_SIGNATURE = "(J)Z"; +const char* UDAF_EXECUTOR_SERIALIZE_LENGTH_SIGNATURE = "()J"; +//Calling Java method about those signture means: "(argument-types)return-type" +//https://www.iitk.ac.in/esc101/05Aug/tutorial/native1.1/implementing/method.html + +struct AggregateJavaUdafData { +public: + AggregateJavaUdafData() = default; + AggregateJavaUdafData(int64_t num_args) { + argument_size = num_args; + first_init = true; + input_values_buffer_ptr.reset(new int64_t[num_args]); + input_nulls_buffer_ptr.reset(new int64_t[num_args]); + input_offsets_ptrs.reset(new int64_t[num_args]); + output_value_buffer.reset(new int64_t); + output_null_value.reset(new int64_t); + output_offsets_ptr.reset(new int64_t); + output_intermediate_state_ptr.reset(new int64_t); + } + + ~AggregateJavaUdafData() { + JNIEnv* env; + Status status; + RETURN_IF_STATUS_ERROR(status, JniUtil::GetJNIEnv(&env)); + env->CallNonvirtualVoidMethod(executor_obj, executor_cl, executor_close_id); + RETURN_IF_STATUS_ERROR(status, JniUtil::GetJniExceptionMsg(env)); + env->DeleteGlobalRef(executor_obj); + } + + Status init_udaf(const TFunction& fn) { + if (first_init) { + JNIEnv* env = nullptr; + RETURN_NOT_OK_STATUS_WITH_WARN(JniUtil::GetJNIEnv(&env), + "Java-Udaf init_udaf function"); + RETURN_IF_ERROR(JniUtil::GetGlobalClassRef(env, UDAF_EXECUTOR_CLASS, &executor_cl)); + RETURN_NOT_OK_STATUS_WITH_WARN(register_func_id(env), + "Java-Udaf register_func_id function"); + + // Add a scoped cleanup jni reference object. This cleans up local refs made below. + JniLocalFrame jni_frame; + { + std::string local_location; + auto function_cache = UserFunctionCache::instance(); + RETURN_IF_ERROR(function_cache->get_jarpath(fn.id, fn.hdfs_location, fn.checksum, + &local_location)); + TJavaUdfExecutorCtorParams ctor_params; + ctor_params.__set_fn(fn); + ctor_params.__set_location(local_location); + ctor_params.__set_input_offsets_ptrs((int64_t)input_offsets_ptrs.get()); + ctor_params.__set_input_buffer_ptrs((int64_t)input_values_buffer_ptr.get()); + ctor_params.__set_input_nulls_ptrs((int64_t)input_nulls_buffer_ptr.get()); + ctor_params.__set_output_buffer_ptr((int64_t)output_value_buffer.get()); + + ctor_params.__set_output_null_ptr((int64_t)output_null_value.get()); + ctor_params.__set_output_offsets_ptr((int64_t)output_offsets_ptr.get()); + ctor_params.__set_output_intermediate_state_ptr( + (int64_t)output_intermediate_state_ptr.get()); + + jbyteArray ctor_params_bytes; + + // Pushed frame will be popped when jni_frame goes out-of-scope. + RETURN_IF_ERROR(jni_frame.push(env)); + RETURN_IF_ERROR(SerializeThriftMsg(env, &ctor_params, &ctor_params_bytes)); + executor_obj = env->NewObject(executor_cl, executor_ctor_id, ctor_params_bytes); + } + RETURN_ERROR_IF_EXC(env); + RETURN_IF_ERROR(JniUtil::LocalToGlobalRef(env, executor_obj, &executor_obj)); + first_init = false; + } + return Status::OK(); + } + + Status add(const IColumn** columns, size_t row_num_start, size_t row_num_end, + const DataTypes& argument_types) { + JNIEnv* env = nullptr; + RETURN_NOT_OK_STATUS_WITH_WARN(JniUtil::GetJNIEnv(&env), "Java-Udaf add function"); + for (int arg_idx = 0; arg_idx < argument_size; ++arg_idx) { + auto data_col = columns[arg_idx]; + if (auto* nullable = check_and_get_column<const ColumnNullable>(*columns[arg_idx])) { + data_col = nullable->get_nested_column_ptr(); + auto null_col = check_and_get_column<ColumnVector<UInt8>>( + nullable->get_null_map_column_ptr()); + input_nulls_buffer_ptr.get()[arg_idx] = + reinterpret_cast<int64_t>(null_col->get_data().data()); + } else { + input_nulls_buffer_ptr.get()[arg_idx] = -1; + } + if (data_col->is_column_string()) { + const ColumnString* str_col = check_and_get_column<ColumnString>(data_col); + input_values_buffer_ptr.get()[arg_idx] = + reinterpret_cast<int64_t>(str_col->get_chars().data()); + input_offsets_ptrs.get()[arg_idx] = + reinterpret_cast<int64_t>(str_col->get_offsets().data()); + } else if (data_col->is_numeric() || data_col->is_column_decimal()) { + input_values_buffer_ptr.get()[arg_idx] = + reinterpret_cast<int64_t>(data_col->get_raw_data().data); + } else { + return Status::InvalidArgument( + strings::Substitute("Java UDAF doesn't support type is $0 now !", + argument_types[arg_idx]->get_name())); + } + } + env->CallNonvirtualVoidMethod(executor_obj, executor_cl, executor_add_id, row_num_start, + row_num_end); + return Status::OK(); + } + + Status merge(const AggregateJavaUdafData& rhs) { + JNIEnv* env = nullptr; + RETURN_NOT_OK_STATUS_WITH_WARN(JniUtil::GetJNIEnv(&env), "Java-Udaf merge function"); + serialize_data = rhs.serialize_data; + long len = serialize_data.length(); + jobject data = env->NewDirectByteBuffer(serialize_data.data(), len); + env->CallNonvirtualVoidMethod(executor_obj, executor_cl, executor_merge_id, data); + return Status::OK(); + } + + Status write(BufferWritable& buf) { + write_binary(first_init, buf); + JNIEnv* env = nullptr; + RETURN_NOT_OK_STATUS_WITH_WARN(JniUtil::GetJNIEnv(&env), "Java-Udaf write function"); + jlong len = + env->CallNonvirtualLongMethod(executor_obj, executor_cl, executor_serialize_len_id); + serialize_data.resize(len); + jobject data = env->NewDirectByteBuffer(serialize_data.data(), len); + env->CallNonvirtualVoidMethod(executor_obj, executor_cl, executor_serialize_id, data); + write_binary(serialize_data, buf); + return Status::OK(); + } + + void read(BufferReadable& buf) { + read_binary(first_init, buf); + read_binary(serialize_data, buf); + } + + Status get(IColumn& to, const DataTypePtr& result_type) const { + to.insert_default(); + JNIEnv* env = nullptr; + RETURN_NOT_OK_STATUS_WITH_WARN(JniUtil::GetJNIEnv(&env), "Java-Udaf get value function"); + if (result_type->is_nullable()) { + auto& nullable = assert_cast<ColumnNullable&>(to); + *output_null_value = + reinterpret_cast<int64_t>(nullable.get_null_map_column().get_raw_data().data); + auto& data_col = nullable.get_nested_column(); + +#ifndef EVALUATE_JAVA_UDAF +#define EVALUATE_JAVA_UDAF \ + if (data_col.is_column_string()) { \ + const ColumnString* str_col = check_and_get_column<ColumnString>(data_col); \ + ColumnString::Chars& chars = const_cast<ColumnString::Chars&>(str_col->get_chars()); \ + ColumnString::Offsets& offsets = \ + const_cast<ColumnString::Offsets&>(str_col->get_offsets()); \ + int increase_buffer_size = 0; \ + *output_value_buffer = reinterpret_cast<int64_t>(chars.data()); \ + *output_offsets_ptr = reinterpret_cast<int64_t>(offsets.data()); \ + *output_intermediate_state_ptr = chars.size(); \ + jboolean res = env->CallNonvirtualBooleanMethod(executor_obj, executor_cl, \ + executor_result_id, to.size() - 1); \ + while (res != JNI_TRUE) { \ + int32_t buffer_size = IncreaseReservedBufferSize(increase_buffer_size); \ + increase_buffer_size++; \ + chars.reserve(chars.size() + buffer_size); \ + chars.resize(chars.size() + buffer_size); \ + *output_intermediate_state_ptr = chars.size(); \ + res = env->CallNonvirtualBooleanMethod(executor_obj, executor_cl, executor_result_id, \ + to.size() - 1); \ + } \ + } else if (data_col.is_numeric() || data_col.is_column_decimal()) { \ + *output_value_buffer = reinterpret_cast<int64_t>(data_col.get_raw_data().data); \ + env->CallNonvirtualBooleanMethod(executor_obj, executor_cl, executor_result_id, \ + to.size() - 1); \ + } else { \ + return Status::InvalidArgument(strings::Substitute( \ + "Java UDAF doesn't support return type is $0 now !", result_type->get_name())); \ + } +#endif + EVALUATE_JAVA_UDAF; + } else { + *output_null_value = -1; + *output_value_buffer = reinterpret_cast<int64_t>(to.get_raw_data().data); + auto& data_col = to; + EVALUATE_JAVA_UDAF; + env->CallNonvirtualBooleanMethod(executor_obj, executor_cl, executor_result_id, + to.size() - 1); + } + return Status::OK(); + } + +private: + static const int32_t INITIAL_RESERVED_BUFFER_SIZE = 1024; + // TODO: we need a heuristic strategy to increase buffer size for variable-size output. + static inline int32_t IncreaseReservedBufferSize(int n) { Review Comment: Move this function to another common file and call it in UDAF and UDF -- This is an automated message from the Apache Git Service. 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