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Author SHA1 Message Date
Adam Retter c6d464a9da Fixed various memory leaks and Java 8 JNI Compatibility 
Summary:
I have manually audited the entire RocksJava code base.

Sorry for the large pull-request, I have broken it down into many small atomic commits though.

My initial intention was to fix the warnings that appear when running RocksJava on Java 8 with `-Xcheck:jni`, for example when running `make jtest` you would see many errors similar to:

```
WARNING in native method: JNI call made without checking exceptions when required to from CallObjectMethod
WARNING in native method: JNI call made without checking exceptions when required to from CallVoidMethod
WARNING in native method: JNI call made without checking exceptions when required to from CallStaticVoidMethod
...
```

A few of those warnings still remain, however they seem to come directly from the JVM and are not directly related to RocksJava; I am in contact with the OpenJDK hostpot-dev mailing list about these - http://mail.openjdk.java.net/pipermail/hotspot-dev/2017-February/025981.html.

As a result of fixing these, I realised we were not r
Closes https://github.com/facebook/rocksdb/pull/1890

Differential Revision: D4591758

Pulled By: siying

fbshipit-source-id: 7f7fdf4
 2017-02-27 16:39:12 -08:00
Adam Retter c5af85ecad Fix a memory leak of Slice objects from org.rocksdb.WBWIRocksIterator#entry1 2016-02-10 14:44:39 +00:00
Baraa Hamodi 21e95811d1 Updated all copyright headers to the new format. 2016-02-09 15:12:00 -08:00
Yueh-Hsuan Chiang 40cd91b7fe Fixed compile warning in rocksdbjava 
Summary:
Fixed the following compile warning in rocksdbjava:

    java/rocksjni/comparatorjnicallback.cc:20:14: warning: unused variable ‘rs’ [-Wunused-variable]
       const jint rs = env->GetJavaVM(&m_jvm);
                  ^
    java/rocksjni/comparatorjnicallback.cc: In member function ‘JNIEnv* rocksdb::BaseComparatorJniCallback::getJniEnv() const’:
    java/rocksjni/comparatorjnicallback.cc:45:8: warning: unused variable ‘rs’ [-Wunused-variable]
       jint rs = m_jvm->AttachCurrentThread(reinterpret_cast<void **>(&env), NULL);
            ^
    java/rocksjni/loggerjnicallback.cc: In constructor ‘rocksdb::LoggerJniCallback::LoggerJniCallback(JNIEnv*, jobject)’:
    java/rocksjni/loggerjnicallback.cc:19:14: warning: unused variable ‘rs’ [-Wunused-variable]
       const jint rs = env->GetJavaVM(&m_jvm);
                  ^
    java/rocksjni/loggerjnicallback.cc: In member function ‘JNIEnv* rocksdb::LoggerJniCallback::getJniEnv() const’:
    java/rocksjni/loggerjnicallback.cc:33:8: warning: unused variable ‘rs’ [-Wunused-variable]
       jint rs = m_jvm->AttachCurrentThread(reinterpret_cast<void **>(&env), NULL);
            ^

Test Plan: make rocksdbjava -j32

Reviewers: sdong, anthony, IslamAbdelRahman, igor

Reviewed By: igor

Subscribers: dhruba, leveldb

Differential Revision: https://reviews.facebook.net/D45891
 2015-08-31 18:36:17 -07:00
fyrz 7e12ae5a21 [RocksJava] - BackupInfos & Restore-/BackupableDB enhancements 
Summary:
- BackupableDB deleteBackup method
- BackupableDB purgeOldBackups bugfix
- BackupInfos now available in Restorable-/BackupableDB
- Extended BackupableDBTest to cover more of the currently implemented functionality.

Test Plan:
make rocksdbjava
make jtest

Differential Revision: https://reviews.facebook.net/D27027
 2014-10-28 18:42:05 +01:00
Adam Retter a6fb7f312d Fix code review comments raised in https://reviews.facebook.net/D22779 2014-10-21 15:52:28 +01:00
Adam Retter 5e25274110 Fix code style problems identified by lint 2014-10-21 15:52:27 +01:00
Adam Retter fc12cb83f2 Add locking to comparator jni callback methods which must be thread-safe 2014-10-21 15:52:27 +01:00
Adam Retter d6fe8dacc8 Feature - Implement Java API for Comparator and Slice. Allows use of 
either byte[] or DirectByteBuffer for accessing underlying data.
 2014-10-21 15:52:27 +01:00