from either java.library.path or from extracting from the Jar. Means
that the test in the build do not need to rely on the Jar, useful when
creating similar builds (and executing tests) from Maven

- see: 62ad0a9b

Summary:
As the C++ part exposes now SequenceNumber retrieval
for Snapshots we want this obviously also in the Java API.

Test Plan:
make rocksdbjava
make jtest
mvn -f rocksjni.pom test

Reviewers: yhchiang, adamretter, ankgup87

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D32571

Summary:
This differential describes further changes to the Java-API

New methods:

* GetUpdatesSince
* GetLatestSequenceNumber
* EnableFileDeletions
* DisableFileDeletions

This pull requests depends on: https://github.com/facebook/rocksdb/pull/472

Test Plan:
make rocksdbjava
make jtest
mvn -f rocksjni.pom package

Reviewers: yhchiang, adamretter, ankgup87

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D32151

While fixing the RocksDB ColumnFamily name the TTL DB
wasn`t touched. This commit resolves this.

Summary:
Simple Java Native Objects usually are represented using
the same functionality but within different classes.

With this commit a template class was introduced to remove
the redundant impelementation to a certain extent.

[RocksJava] Removed todo comment in portal.h

As jclass instances shall not be cached, both
todos are obsolete and can be removed.

[RocksJava] Add missing test to Makefile

[RocksJava] Added tests for uncovered methods

Test Plan:
make rocksdbjava
make jtest
mvn -f rocksjni.pom package

Reviewers: adamretter, yhchiang, ankgup87

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D32145

As jclass instances shall not be cached, both
todos are obsolete and can be removed.

Simple Java Native Objects usually are represented using
the same functionality but within different classes.

With this commit a template class was introduced to remove
the redundant impelementation to a certain extent.

Summary:
Prior to this the native library loader instance didn`t
care about a state. So if library loading was called multiple
times, multiple copies of the shared object were put into
the tmp folder and loaded into the JVM.

This changed within this commit to the following behavior:

- library loading is now synchronized
- library is loaded within the first call
- if loading was successful the library loaded sets a flag
- every subsequent call checks for a boolean flag indicating if there was
  already a successful attempt

Test Plan:
- Execute example and watch tmp folder while the example is running

- After this patch only one shared object will be in the tmp folder

Usual tests:
- make rocksdbjava jtest
- mvn -f rocksjni.pom package

Reviewers: adamretter, ankgup87, yhchiang

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D32133

The methods:

- newIterator
- iterators

support now also ReadOptions. That allows a user of the Java API
to retrieve RocksIterator instances on a snapshot.

- added spaces between operators
- removed obsolete text in JavaDoc

- Added support for format version in BlockBasedTableConfig

Summary:
Previous to this commit there was a problem with unterminated
String usage as jByteArrays are not zero terminated.

Test Plan:
make rocksdbjava
make jtest
mvn -f rocksjni.pom package

Reviewers: yhchiang, adamretter, ankgup87

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D31809

Previous to this commit there was a problem with unterminated
String usage as jByteArrays are not zero terminated.

Summary:
TTLDB Support exposed in Java-API. It is now
possible to open a datbase using the RocksDB time
to live feature.

Test Plan:
make rocksdbjava
make test
mvn -f rocksjni.pom package

@Adam please test mac osx compile

Reviewers: yhchiang, adamretter, ankgup87

Subscribers: dhruba, adam

Differential Revision: https://reviews.facebook.net/D31449

DirectSlice fix for non terminated String copy. This lead sometimes
to problems with DirectSliceTest.

Previous to this commit identiy checks were performed. Now tests are
performed using equals - method as intended.

Some of the latest commits included illegal JavaDoc formattings.