57f2a00c6f
Summary: Within this commit a new AbstractLogger was introduced which allows to handle log messages at an application level. Log messages are passed up to Java using a JNI callback. This allows a Java-Developer to use common Java APIs for log messages e.g. SLF4J, LOG4J, etc. Within this commit no new dependencies were introduced, which keeps the RocksDB API clean and doesn`t force a developer to use a predefined high-level Java API. Another feature is to dynamically set a custom loggers verbosity at runtime using its public method `setInfoLogLevel` and to retrieve the currently active level using the `infoLogLevel` method. Test Plan: make clean jclean rocksdbjava jtest mvn -f rocksjni.pom package Reviewers: adamretter, ankgup87, yhchiang Subscribers: dhruba Differential Revision: https://reviews.facebook.net/D34755
45 lines
1.4 KiB
C++
45 lines
1.4 KiB
C++
// Copyright (c) 2015, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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//
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// This file implements the callback "bridge" between Java and C++ for
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// rocksdb::Logger
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#ifndef JAVA_ROCKSJNI_LOGGERJNICALLBACK_H_
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#define JAVA_ROCKSJNI_LOGGERJNICALLBACK_H_
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#include <jni.h>
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#include <string>
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#include "port/port.h"
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#include "rocksdb/env.h"
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namespace rocksdb {
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class LoggerJniCallback : public Logger {
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public:
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LoggerJniCallback(JNIEnv* env, jobject jLogger);
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virtual ~LoggerJniCallback();
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using Logger::SetInfoLogLevel;
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using Logger::GetInfoLogLevel;
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// Write an entry to the log file with the specified format.
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virtual void Logv(const char* format, va_list ap);
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// Write an entry to the log file with the specified log level
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// and format. Any log with level under the internal log level
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// of *this (see @SetInfoLogLevel and @GetInfoLogLevel) will not be
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// printed.
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virtual void Logv(const InfoLogLevel log_level,
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const char* format, va_list ap);
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protected:
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JNIEnv* getJniEnv() const;
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private:
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JavaVM* m_jvm;
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jobject m_jLogger;
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jmethodID m_jLogMethodId;
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};
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} // namespace rocksdb
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#endif // JAVA_ROCKSJNI_LOGGERJNICALLBACK_H_
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