[GitHub] [nifi-minifi-cpp] martinzink commented on a change in pull request #1188: MINIFICPP-1651: Added DefragTextFlowFiles processor

[GitBox <gi...@apache.org>]

martinzink commented on a change in pull request #1188:
URL: https://github.com/apache/nifi-minifi-cpp/pull/1188#discussion_r723399621



##########
File path: extensions/standard-processors/processors/DefragTextFlowFiles.h
##########
@@ -0,0 +1,121 @@
+/**
+ * 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
+
+#include <regex>
+#include <memory>
+#include <string>
+#include <set>
+
+#include "core/Processor.h"
+#include "utils/FlowFileStore.h"
+#include "utils/Enum.h"
+#include "serialization/PayloadSerializer.h"
+
+
+namespace org::apache::nifi::minifi::processors {
+
+class DefragTextFlowFiles : public core::Processor {
+ public:
+  explicit DefragTextFlowFiles(const std::string& name,  const utils::Identifier& uuid = {})
+      : Processor(name, uuid) {
+    logger_ = logging::LoggerFactory<DefragTextFlowFiles>::getLogger();
+  }
+  EXTENSIONAPI static core::Relationship Self;
+  EXTENSIONAPI static core::Relationship Success;
+  EXTENSIONAPI static core::Relationship Original;
+  EXTENSIONAPI static core::Relationship Failure;
+
+  EXTENSIONAPI static core::Property Pattern;
+  EXTENSIONAPI static core::Property PatternLoc;
+  EXTENSIONAPI static core::Property MaxBufferAge;
+  EXTENSIONAPI static core::Property MaxBufferSize;
+
+  void initialize() override;
+  void onSchedule(core::ProcessContext* context, core::ProcessSessionFactory* sessionFactory) override;
+  void onTrigger(core::ProcessContext* context, core::ProcessSession* session) override;
+  void restore(const std::shared_ptr<core::FlowFile>& flowFile) override;
+  std::set<std::shared_ptr<core::Connectable>> getOutGoingConnections(const std::string &relationship) const override;
+
+  SMART_ENUM(PatternLocation,
+             (END_OF_MESSAGE, "End of Message"),
+             (START_OF_MESSAGE, "Start of Message")
+  )
+
+  class LastPatternFinder : public InputStreamCallback {
+   public:
+    LastPatternFinder(const std::regex& pattern, PatternLocation pattern_location) : pattern_(pattern), pattern_location_(pattern_location) {}
+    ~LastPatternFinder() override = default;
+    int64_t process(const std::shared_ptr<io::BaseStream>& stream) override;
+
+    bool foundPattern() const { return last_pattern_location.has_value(); }
+    const std::optional<size_t>& getLastPatternPosition() const { return last_pattern_location; }
+
+   protected:
+    void searchContent(const std::string& content);
+    const std::regex& pattern_;
+    PatternLocation pattern_location_;
+    std::optional<size_t> last_pattern_location;
+  };

Review comment:
       I exposed it so it can be unit tested (extensions/standard-processors/tests/unit/DefragTextFlowFilesTests.cpp) TEST_CASE("FindLastRegexTest1", "[findlastregextest]")
   TEST_CASE("FindLastRegexTest2", "[findlastregextest2]")




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