Reduce long time memory usage

driver/src/main/java/org/neo4j/driver/internal/connector/socket/BufferingChunkedInput.java

@@ -81,9 +81,9 @@ public BufferingChunkedInput( ReadableByteChannel ch )
     public BufferingChunkedInput( ReadableByteChannel channel, int bufferCapacity )
     {
         assert bufferCapacity >= 1;
-        this.buffer = ByteBuffer.allocateDirect( bufferCapacity ).order( ByteOrder.BIG_ENDIAN );
+        this.buffer = ByteBuffer.allocate( bufferCapacity ).order( ByteOrder.BIG_ENDIAN );
         this.buffer.limit( 0 );
-        this.scratchBuffer = ByteBuffer.allocateDirect( 8 ).order( ByteOrder.BIG_ENDIAN );
+        this.scratchBuffer = ByteBuffer.allocate( 8 ).order( ByteOrder.BIG_ENDIAN );
         this.channel = channel;
         this.state = State.AWAITING_CHUNK;
     }

driver/src/main/java/org/neo4j/driver/internal/connector/socket/ChunkedInput.java

@@ -37,7 +37,7 @@ public class ChunkedInput implements PackInput
     private final ByteBuffer buffer;
 
     /* a special buffer for chunk header */
-    private final ByteBuffer chunkHeaderBuffer = ByteBuffer.allocateDirect( 2 );
+    private final ByteBuffer chunkHeaderBuffer = ByteBuffer.allocate( 2 );
 
     /* the size of bytes that have not been read in current incoming chunk */
     private int unreadChunkSize = 0;
@@ -52,7 +52,7 @@ public ChunkedInput( ReadableByteChannel ch )
     public ChunkedInput( int bufferCapacity, ReadableByteChannel channel )
     {
         assert bufferCapacity >= 1;
-        buffer = ByteBuffer.allocateDirect( bufferCapacity ).order( ByteOrder.BIG_ENDIAN );
+        buffer = ByteBuffer.allocate( bufferCapacity ).order( ByteOrder.BIG_ENDIAN );
         buffer.limit( 0 );
         this.channel = channel;
     }

driver/src/main/java/org/neo4j/driver/internal/connector/socket/ChunkedOutput.java

@@ -48,7 +48,7 @@ public ChunkedOutput( WritableByteChannel ch )
 
     public ChunkedOutput( int bufferSize, WritableByteChannel ch )
     {
-        buffer = ByteBuffer.allocateDirect(  max( 16, bufferSize ) );
+        buffer = ByteBuffer.allocate(  max( 16, bufferSize ) );
         chunkOpen = false;
         channel = ch;
     }

driver/src/main/java/org/neo4j/driver/internal/connector/socket/SocketClient.java

@@ -170,7 +170,7 @@ private SocketProtocol negotiateProtocol() throws IOException
     {
         logger.debug( "~~ [HANDSHAKE] [0x6060B017, 1, 0, 0, 0]." );
         //Propose protocol versions
-        ByteBuffer buf = ByteBuffer.allocateDirect( 5 * 4 ).order( BIG_ENDIAN );
+        ByteBuffer buf = ByteBuffer.allocate( 5 * 4 ).order( BIG_ENDIAN );
         buf.putInt( MAGIC_PREAMBLE );
         for ( int version : SUPPORTED_VERSIONS )
         {

driver/src/main/java/org/neo4j/driver/internal/connector/socket/TLSSocketChannel.java

@@ -61,7 +61,7 @@ public class TLSSocketChannel implements ByteChannel
     private ByteBuffer plainIn;
     private ByteBuffer plainOut;
 
-    private static final ByteBuffer DUMMY_BUFFER = ByteBuffer.allocateDirect( 0 );
+    private static final ByteBuffer DUMMY_BUFFER = ByteBuffer.allocate( 0 );
 
     public TLSSocketChannel( String host, int port, ByteChannel channel, Logger logger,
                              TrustStrategy trustStrategy )
@@ -75,10 +75,10 @@ public TLSSocketChannel( String host, int port, ByteChannel channel, Logger logg
     public TLSSocketChannel( ByteChannel channel, Logger logger, SSLEngine sslEngine ) throws GeneralSecurityException, IOException
     {
         this(channel, logger, sslEngine,
-             ByteBuffer.allocateDirect( sslEngine.getSession().getApplicationBufferSize() ),
-             ByteBuffer.allocateDirect( sslEngine.getSession().getPacketBufferSize() ),
-             ByteBuffer.allocateDirect( sslEngine.getSession().getApplicationBufferSize() ),
-             ByteBuffer.allocateDirect( sslEngine.getSession().getPacketBufferSize() ) );
+             ByteBuffer.allocate( sslEngine.getSession().getApplicationBufferSize() ),
+             ByteBuffer.allocate( sslEngine.getSession().getPacketBufferSize() ),
+             ByteBuffer.allocate( sslEngine.getSession().getApplicationBufferSize() ),
+             ByteBuffer.allocate( sslEngine.getSession().getPacketBufferSize() ) );
     }
 
     TLSSocketChannel( ByteChannel channel, Logger logger, SSLEngine sslEngine,
@@ -216,7 +216,7 @@ private HandshakeStatus unwrap( ByteBuffer buffer ) throws IOException
                                            "buffer size allowed is %s. The content in the buffer is: %s\n",
                                     curAppSize, newAppSize, appSize * 2, BytePrinter.hex( plainIn ) ) );
                 }
-                ByteBuffer newPlainIn = ByteBuffer.allocateDirect( newAppSize );
+                ByteBuffer newPlainIn = ByteBuffer.allocate( newAppSize );
                 newPlainIn.put( plainIn );
                 plainIn = newPlainIn;
                 logger.debug( "Enlarged application input buffer from %s to %s. " +
@@ -229,7 +229,7 @@ private HandshakeStatus unwrap( ByteBuffer buffer ) throws IOException
                 // Resize buffer if needed.
                 if ( netSize > curNetSize )
                 {
-                    ByteBuffer newCipherIn = ByteBuffer.allocateDirect( netSize );
+                    ByteBuffer newCipherIn = ByteBuffer.allocate( netSize );
                     newCipherIn.put( cipherIn );
                     cipherIn = newCipherIn;
                     logger.debug( "Enlarged network input buffer from %s to %s. " +
@@ -297,7 +297,7 @@ private HandshakeStatus wrap( ByteBuffer buffer ) throws IOException
                                        "new network buffer.", curNetSize, netSize, buffer.capacity() ) );
             }
 
-            cipherOut = ByteBuffer.allocateDirect( netSize );
+            cipherOut = ByteBuffer.allocate( netSize );
             logger.debug( "Enlarged network output buffer from %s to %s. " +
                           "This operation should be a rare operation.", curNetSize, netSize );
             break;

driver/src/main/java/org/neo4j/driver/internal/packstream/BufferedChannelInput.java

@@ -39,7 +39,7 @@ public BufferedChannelInput(ReadableByteChannel ch )
 
     public BufferedChannelInput( int bufferCapacity, ReadableByteChannel ch )
     {
-        this.buffer = ByteBuffer.allocateDirect( bufferCapacity ).order( ByteOrder.BIG_ENDIAN );
+        this.buffer = ByteBuffer.allocate( bufferCapacity ).order( ByteOrder.BIG_ENDIAN );
         reset( ch );
     }
 

driver/src/main/java/org/neo4j/driver/internal/packstream/BufferedChannelOutput.java

@@ -30,7 +30,7 @@ public class BufferedChannelOutput implements PackOutput
 
     public BufferedChannelOutput( int bufferSize )
     {
-        this.buffer = ByteBuffer.allocateDirect( bufferSize ).order( ByteOrder.BIG_ENDIAN );
+        this.buffer = ByteBuffer.allocate( bufferSize ).order( ByteOrder.BIG_ENDIAN );
     }
 
     public BufferedChannelOutput( WritableByteChannel channel )