adamdebreceni commented on a change in pull request #1188: URL: https://github.com/apache/nifi-minifi-cpp/pull/1188#discussion_r723362437
########## File path: extensions/standard-processors/processors/DefragTextFlowFiles.cpp ########## @@ -0,0 +1,336 @@ +/** + * 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 "DefragTextFlowFiles.h" + +#include <vector> + +#include "core/Resource.h" +#include "serialization/PayloadSerializer.h" +#include "utils/TextFragmentUtils.h" + + +namespace org::apache::nifi::minifi::processors { + +core::Relationship DefragTextFlowFiles::Success("success", "Flowfiles that have no fragmented messages in them"); +core::Relationship DefragTextFlowFiles::Original("original", "The FlowFiles that were used to create the defragmented flowfiles"); +core::Relationship DefragTextFlowFiles::Failure("failure", "Flowfiles that failed the defragmentation process"); +core::Relationship DefragTextFlowFiles::Self("__self__", "Marks the FlowFile to be owned by this processor"); + +core::Property DefragTextFlowFiles::Pattern( + core::PropertyBuilder::createProperty("Pattern") + ->withDescription("A regular expression to match at the start or end of messages.") + ->withDefaultValue("")->isRequired(true)->build()); + +core::Property DefragTextFlowFiles::PatternLoc( + core::PropertyBuilder::createProperty("Pattern Location")->withDescription("Where to look for the pattern.") + ->withAllowableValues(PatternLocation::values()) + ->withDefaultValue(toString(PatternLocation::START_OF_MESSAGE))->build()); + + +core::Property DefragTextFlowFiles::MaxBufferSize( + core::PropertyBuilder::createProperty("Max Buffer Size") + ->withDescription("The maximum buffer size, if the buffer exceeds this, it will be transferred to failure. Expected format is <size> <data unit>") + ->withType(core::StandardValidators::get().DATA_SIZE_VALIDATOR)->build()); + +core::Property DefragTextFlowFiles::MaxBufferAge( + core::PropertyBuilder::createProperty("Max Buffer Age")-> + withDescription("The maximum age of a buffer after which the buffer will be transferred to failure. Expected format is <duration> <time unit>")->build()); + +void DefragTextFlowFiles::initialize() { + std::lock_guard<std::mutex> defrag_lock(defrag_mutex_); + + setSupportedRelationships({Success, Original, Failure}); + setSupportedProperties({Pattern, PatternLoc, MaxBufferAge, MaxBufferSize}); +} + +void DefragTextFlowFiles::onSchedule(core::ProcessContext* context, core::ProcessSessionFactory*) { + std::lock_guard<std::mutex> defrag_lock(defrag_mutex_); + + std::string max_buffer_age_str; + if (context->getProperty(MaxBufferAge.getName(), max_buffer_age_str)) { + core::TimeUnit unit; + uint64_t max_buffer_age; + if (core::Property::StringToTime(max_buffer_age_str, max_buffer_age, unit) && core::Property::ConvertTimeUnitToMS(max_buffer_age, unit, max_buffer_age)) { + buffer_.setMaxAge(max_buffer_age); + logger_->log_trace("The Buffer maximum age is configured to be %d", max_buffer_age); + } + } + + std::string max_buffer_size_str; + if (context->getProperty(MaxBufferSize.getName(), max_buffer_size_str)) { + uint64_t max_buffer_size = core::DataSizeValue(max_buffer_size_str).getValue(); + if (max_buffer_size > 0) { + buffer_.setMaxSize(max_buffer_size); + logger_->log_trace("The Buffer maximum size is configured to be %d", max_buffer_size); + } + } + + context->getProperty(PatternLoc.getName(), pattern_location_); + + std::string pattern_str; + if (context->getProperty(Pattern.getName(), pattern_str)) { + pattern_ = std::regex(pattern_str); + logger_->log_trace("The Pattern is configured to be %s", pattern_str); + } +} + +int64_t DefragTextFlowFiles::LastPatternFinder::process(const std::shared_ptr<io::BaseStream>& stream) { + if (nullptr == stream) + return 0; + std::vector<uint8_t> buffer; + const auto ret = stream->read(buffer, stream->size()); + if (io::isError(ret)) + return -1; + std::string content(buffer.begin(), buffer.end()); + searchContent(content); + + return 0; +} + +void DefragTextFlowFiles::LastPatternFinder::searchContent(const std::string &content) { + auto matches_begin = std::sregex_iterator(content.begin(), content.end(), pattern_); + auto number_of_matches = std::distance(matches_begin, std::sregex_iterator()); + if (number_of_matches > 0) { + auto last_match = matches_begin; + for (int i = 1; i < number_of_matches; ++i) + last_match++; + last_pattern_location = last_match->position(0); + if (pattern_location_ == PatternLocation::END_OF_MESSAGE) + last_pattern_location.value() += last_match->str(0).size(); Review comment: could we use the `regex_match::length(0)` method here? -- This is an automated message from the Apache Git Service. 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