ClickHouse/dbms/src/Dictionaries/HTTPDictionarySource.cpp
alexey-milovidov d4d266fa18 ColumnConst unification (#1011)
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* Fixed error in ColumnArray::replicateGeneric [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].

* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
2017-07-21 09:35:58 +03:00

108 lines
3.6 KiB
C++

#include <Dictionaries/HTTPDictionarySource.h>
#include <Poco/Net/HTTPRequest.h>
#include <Interpreters/Context.h>
#include <DataStreams/OwningBlockInputStream.h>
#include <IO/ReadWriteBufferFromHTTP.h>
#include <DataStreams/IBlockOutputStream.h>
#include <DataTypes/DataTypesNumber.h>
#include <IO/WriteBufferFromOStream.h>
#include <Dictionaries/DictionarySourceHelpers.h>
#include <common/logger_useful.h>
namespace DB
{
static const size_t max_block_size = 8192;
HTTPDictionarySource::HTTPDictionarySource(const DictionaryStructure & dict_struct_,
const Poco::Util::AbstractConfiguration & config, const std::string & config_prefix,
Block & sample_block, const Context & context)
: log(&Logger::get("HTTPDictionarySource")),
dict_struct{dict_struct_},
url{config.getString(config_prefix + ".url", "")},
format{config.getString(config_prefix + ".format")},
sample_block{sample_block},
context(context)
{
}
HTTPDictionarySource::HTTPDictionarySource(const HTTPDictionarySource & other)
: log(&Logger::get("HTTPDictionarySource")),
dict_struct{other.dict_struct},
url{other.url},
format{other.format},
sample_block{other.sample_block},
context(other.context)
{
}
BlockInputStreamPtr HTTPDictionarySource::loadAll()
{
LOG_TRACE(log, "loadAll " + toString());
Poco::URI uri(url);
auto in_ptr = std::make_unique<ReadWriteBufferFromHTTP>(uri, Poco::Net::HTTPRequest::HTTP_GET);
auto input_stream = context.getInputFormat(format, *in_ptr, sample_block, max_block_size);
return std::make_shared<OwningBlockInputStream<ReadWriteBufferFromHTTP>>(input_stream, std::move(in_ptr));
}
BlockInputStreamPtr HTTPDictionarySource::loadIds(const std::vector<UInt64> & ids)
{
LOG_TRACE(log, "loadIds " << toString() << " size = " << ids.size());
ReadWriteBufferFromHTTP::OutStreamCallback out_stream_callback = [&](std::ostream & ostr)
{
WriteBufferFromOStream out_buffer(ostr);
auto output_stream = context.getOutputFormat(format, out_buffer, sample_block);
formatIDs(output_stream, ids);
};
Poco::URI uri(url);
auto in_ptr = std::make_unique<ReadWriteBufferFromHTTP>(uri, Poco::Net::HTTPRequest::HTTP_POST, out_stream_callback);
auto input_stream = context.getInputFormat(format, *in_ptr, sample_block, max_block_size);
return std::make_shared<OwningBlockInputStream<ReadWriteBufferFromHTTP>>(input_stream, std::move(in_ptr));
}
BlockInputStreamPtr HTTPDictionarySource::loadKeys(
const Columns & key_columns, const std::vector<size_t> & requested_rows)
{
LOG_TRACE(log, "loadKeys " << toString() << " size = " << requested_rows.size());
ReadWriteBufferFromHTTP::OutStreamCallback out_stream_callback = [&](std::ostream & ostr)
{
WriteBufferFromOStream out_buffer(ostr);
auto output_stream = context.getOutputFormat(format, out_buffer, sample_block);
formatKeys(dict_struct, output_stream, key_columns, requested_rows);
};
Poco::URI uri(url);
auto in_ptr = std::make_unique<ReadWriteBufferFromHTTP>(uri, Poco::Net::HTTPRequest::HTTP_POST, out_stream_callback);
auto input_stream = context.getInputFormat(format, *in_ptr, sample_block, max_block_size);
return std::make_shared<OwningBlockInputStream<ReadWriteBufferFromHTTP>>(input_stream, std::move(in_ptr));
}
bool HTTPDictionarySource::isModified() const
{
return true;
}
bool HTTPDictionarySource::supportsSelectiveLoad() const
{
return true;
}
DictionarySourcePtr HTTPDictionarySource::clone() const
{
return std::make_unique<HTTPDictionarySource>(*this);
}
std::string HTTPDictionarySource::toString() const
{
Poco::URI uri(url);
return uri.toString();
}
}