// 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.

#include "runtime/result_sink.h"

#include "common/config.h"
#include "util/uid_util.h"
#include "exprs/expr.h"
#include "runtime/row_batch.h"
#include "runtime/runtime_state.h"
#include "runtime/exec_env.h"
#include "runtime/result_buffer_mgr.h"
#include "runtime/buffer_control_block.h"
#include "runtime/result_writer.h"
#include "runtime/mem_tracker.h"

namespace doris {

ResultSink::ResultSink(const RowDescriptor& row_desc, const std::vector<TExpr>& t_output_expr,
                       const TResultSink& sink, int buffer_size)
    : _row_desc(row_desc),
      _t_output_expr(t_output_expr),
      _buf_size(buffer_size) {
}

ResultSink::~ResultSink() {
}

Status ResultSink::prepare_exprs(RuntimeState* state) {
    // From the thrift expressions create the real exprs.
    RETURN_IF_ERROR(Expr::create_expr_trees(
            state->obj_pool(), _t_output_expr, &_output_expr_ctxs));
    // Prepare the exprs to run.
    RETURN_IF_ERROR(Expr::prepare(
            _output_expr_ctxs, state, _row_desc, _expr_mem_tracker.get()));
    return Status::OK;
}

Status ResultSink::prepare(RuntimeState* state) {
    RETURN_IF_ERROR(DataSink::prepare(state));
    std::stringstream title;
    title << "DataBufferSender (dst_fragment_instance_id=" << print_id(state->fragment_instance_id()) << ")";
    // create profile
    _profile = state->obj_pool()->add(new RuntimeProfile(state->obj_pool(), title.str()));
    // prepare output_expr
    RETURN_IF_ERROR(prepare_exprs(state));
    // create sender
    RETURN_IF_ERROR(state->exec_env()->result_mgr()->create_sender(
                        state->fragment_instance_id(), _buf_size, &_sender));
    // create writer
    _writer.reset(new(std::nothrow) ResultWriter(_sender.get(), _output_expr_ctxs));
    RETURN_IF_ERROR(_writer->init(state));

    return Status::OK;
}

Status ResultSink::open(RuntimeState* state) {
    return Expr::open(_output_expr_ctxs, state);
}

Status ResultSink::send(RuntimeState* state, RowBatch* batch) {
    return _writer->append_row_batch(batch);
}

Status ResultSink::close(RuntimeState* state, Status exec_status) {
    if (_closed) {
        return Status::OK;
    }
    // close sender, this is normal path end
    if (_sender) {
        _sender->close(exec_status);
    }
    state->exec_env()->result_mgr()->cancel_at_time(time(NULL) + config::result_buffer_cancelled_interval_time, 
                                                    state->fragment_instance_id());
    Expr::close(_output_expr_ctxs, state);

    _closed = true;
    return Status::OK;
}

}
/* vim: set ts=4 sw=4 sts=4 tw=100 : */
