RocksDB static build

Make file changes to download and build the dependencies
.Load the shared library when RocksDB is initialized

Makefile

@@ -175,7 +175,7 @@ endif  # PLATFORM_SHARED_EXT
 
 .PHONY: blackbox_crash_test check clean coverage crash_test ldb_tests \
 	release tags valgrind_check whitebox_crash_test format static_lib shared_lib all \
-	dbg
+	dbg rocksdbjavastatic rocksdbjava
 
 all: $(LIBRARY) $(PROGRAMS) $(TESTS)
 
@@ -480,6 +480,36 @@ ROCKSDBJNILIB = librocksdbjni.jnilib
 JAVA_INCLUDE = -I/System/Library/Frameworks/JavaVM.framework/Headers/
 endif
 
+
+rocksdbjavastatic:
+	#build zlib 
+	curl -O http://zlib.net/zlib-1.2.8.tar.gz
+	tar xvzf zlib-1.2.8.tar.gz
+	cd zlib-1.2.8 && CFLAGS='-fPIC' ./configure --static && make
+	cp zlib-1.2.8/libz.a .
+	rm -rf zlib-1.2.8.tar.gz zlib-1.2.8
+
+	#build bzip
+	curl -O  http://www.bzip.org/1.0.6/bzip2-1.0.6.tar.gz
+	tar xvzf bzip2-1.0.6.tar.gz
+	cd bzip2-1.0.6 && make CFLAGS='-fPIC -Wall -Winline -O2 -g -D_FILE_OFFSET_BITS=64'
+	cp bzip2-1.0.6/libbz2.a .
+	rm -rf bzip2-1.0.6.tar.gz bzip2-1.0.6
+
+	#build snappy
+	curl -O https://snappy.googlecode.com/files/snappy-1.1.1.tar.gz
+	tar xvzf snappy-1.1.1.tar.gz
+	cd snappy-1.1.1 && ./configure --with-pic --enable-static 
+	cd snappy-1.1.1 && make
+	cp snappy-1.1.1/.libs/libsnappy.a .
+	rm -rf snappy-1.1.1 snappy-1.1.1.tar.gz
+	OPT="-fPIC -DNDEBUG -O2" $(MAKE) $(LIBRARY) -j
+	cd java;$(MAKE) java;
+	rm -f ./java/$(ROCKSDBJNILIB)
+	$(CXX) $(CXXFLAGS) -I./java/. $(JAVA_INCLUDE) -shared -fPIC -o ./java/$(ROCKSDBJNILIB) $(JNI_NATIVE_SOURCES) $(LIBOBJECTS) $(COVERAGEFLAGS) libz.a libbz2.a libsnappy.a
+	cd java;jar -cf $(ROCKSDB_JAR) org/rocksdb/*.class org/rocksdb/util/*.class HISTORY*.md $(ROCKSDBJNILIB)
+
+
 rocksdbjava:
 	OPT="-fPIC -DNDEBUG -O2" $(MAKE) $(LIBRARY) -j32
 	cd java;$(MAKE) java;

java/org/rocksdb/NativeLibraryLoader.java

@@ -0,0 +1,46 @@
+package org.rocksdb;
+
+import java.io.*;
+
+public class NativeLibraryLoader
+{
+
+  private static String sharedLibraryName = "librocksdbjni.so";
+  private static String tempFilePrefix = "librocksdbjni";
+  private static String tempFileSuffix = ".so";
+  /**
+   * Private constructor - this class will never be instanced
+   */
+  private NativeLibraryLoader() {
+  }
+
+  public static void loadLibraryFromJar() throws IOException {
+
+    File temp = File.createTempFile(tempFilePrefix, tempFileSuffix);
+    temp.deleteOnExit();
+
+    if (!temp.exists()) {
+      throw new FileNotFoundException("File " + temp.getAbsolutePath() + " does not exist.");
+    }
+
+    byte[] buffer = new byte[1024];
+    int readBytes;
+
+    InputStream is = ClassLoader.getSystemClassLoader().getResourceAsStream(sharedLibraryName);
+    if (is == null) {
+      throw new FileNotFoundException(sharedLibraryName + " was not found inside JAR.");
+    }
+
+    OutputStream os = new FileOutputStream(temp);
+    try {
+      while ((readBytes = is.read(buffer)) != -1) {
+        os.write(buffer, 0, readBytes);
+      }
+    } finally {
+      os.close();
+      is.close();
+    }
+
+    System.load(temp.getAbsolutePath());
+  }
+}

java/org/rocksdb/Options.java

@@ -13,6 +13,9 @@
  * native resources will be released as part of the process.
  */
 public class Options extends RocksObject {
+  static{
+    RocksDB.loadLibrary();
+  }
   static final long DEFAULT_CACHE_SIZE = 8 << 20;
   static final int DEFAULT_NUM_SHARD_BITS = -1;
   /**

java/org/rocksdb/RocksDB.java

@@ -11,23 +11,32 @@
 import java.io.Closeable;
 import java.io.IOException;
 import org.rocksdb.util.Environment;
+import org.rocksdb.NativeLibraryLoader;
 
 /**
  * A RocksDB is a persistent ordered map from keys to values.  It is safe for
  * concurrent access from multiple threads without any external synchronization.
  * All methods of this class could potentially throw RocksDBException, which
  * indicates sth wrong at the rocksdb library side and the call failed.
  */
-public class RocksDB extends RocksObject {
+public class RocksDB extends org.rocksdb.RocksObject
+{
+
   public static final int NOT_FOUND = -1;
   private static final String[] compressionLibs_ = {
       "snappy", "z", "bzip2", "lz4", "lz4hc"};
 
+  static {
+      loadLibrary();
+  }
+
+
   /**
    * Loads the necessary library files.
    * Calling this method twice will have no effect.
    */
-  public static synchronized void loadLibrary() {
+  public static synchronized void loadLibrary()
+  {
     // loading possibly necessary libraries.
     for (String lib : compressionLibs_) {
       try {
@@ -36,8 +45,15 @@ public static synchronized void loadLibrary() {
         // since it may be optional, we ignore its loading failure here.
       }
     }
-    // However, if any of them is required.  We will see error here.
-    System.loadLibrary("rocksdbjni");
+
+    try
+    {
+      NativeLibraryLoader.loadLibraryFromJar();
+    }
+    catch (IOException e)
+    {
+      e.printStackTrace();
+    }
   }
 
   /**