buffer: allow to configure default buffer initial capacity

- set initial capacity to 1024 bytes

jooby/src/main/java/io/jooby/buffer/DataBufferFactory.java

@@ -17,6 +17,20 @@
  * @see DataBuffer
  */
 public interface DataBufferFactory {
+ /**
+ * Buffer of a default initial capacity. Default capacity is <code>1024</code> bytes.
+ *
+ * @return buffer of a default initial capacity.
+ */
+ int getDefaultInitialCapacity();
+
+ /**
+ * Set default buffer initial capacity.
+ *
+ * @param defaultInitialCapacity Default initial buffer capacity.
+ * @return This buffer factory.
+ */
+ DataBufferFactory setDefaultInitialCapacity(int defaultInitialCapacity);
 
  /**
  * Allocate a data buffer of a default initial capacity. Depending on the underlying

jooby/src/main/java/io/jooby/buffer/DefaultDataBufferFactory.java

@@ -24,7 +24,7 @@ public class DefaultDataBufferFactory implements DataBufferFactory {
  * @see #DefaultDataBufferFactory()
  * @see #DefaultDataBufferFactory(boolean)
  */
- public static final int DEFAULT_INITIAL_CAPACITY = 4096;
+ public static final int DEFAULT_INITIAL_CAPACITY = 1024;
 
  /**
  * Shared instance based on the default constructor.
@@ -35,7 +35,7 @@ public class DefaultDataBufferFactory implements DataBufferFactory {
 
  private final boolean preferDirect;
 
- private final int defaultInitialCapacity;
+ private int defaultInitialCapacity;
 
  /**
  * Creates a new {@code DefaultDataBufferFactory} with default settings.
@@ -69,6 +69,17 @@ public DefaultDataBufferFactory(boolean preferDirect, int defaultInitialCapacity
  this.defaultInitialCapacity = defaultInitialCapacity;
  }
 
+ @Override
+ public int getDefaultInitialCapacity() {
+ return defaultInitialCapacity;
+ }
+
+ @Override
+ public DataBufferFactory setDefaultInitialCapacity(int defaultInitialCapacity) {
+ this.defaultInitialCapacity = defaultInitialCapacity;
+ return this;
+ }
+
  @Override
  public DefaultDataBuffer allocateBuffer() {
  return allocateBuffer(this.defaultInitialCapacity);

modules/jooby-netty/src/main/java/io/jooby/netty/buffer/NettyDataBufferFactory.java

@@ -41,6 +41,7 @@ public class NettyDataBufferFactory implements DataBufferFactory {
  }
 
  private final ByteBufAllocator byteBufAllocator;
+ private int defaultInitialCapacity = 1024;
 
  /**
  * Create a new {@code NettyDataBufferFactory} based on the given factory.
@@ -63,10 +64,20 @@ public ByteBufAllocator getByteBufAllocator() {
  return this.byteBufAllocator;
  }
 
+ @Override
+ public int getDefaultInitialCapacity() {
+ return defaultInitialCapacity;
+ }
+
+ @Override
+ public NettyDataBufferFactory setDefaultInitialCapacity(int defaultInitialCapacity) {
+ this.defaultInitialCapacity = defaultInitialCapacity;
+ return this;
+ }
+
  @Override
  public NettyDataBuffer allocateBuffer() {
- ByteBuf byteBuf = this.byteBufAllocator.buffer();
- return new NettyDataBuffer(byteBuf, this);
+ return allocateBuffer(defaultInitialCapacity);
  }
 
  @Override

tests/src/test/java/io/jooby/buffer/LeakAwareDataBufferFactory.java

@@ -56,6 +56,17 @@ public LeakAwareDataBufferFactory(DataBufferFactory delegate) {
  this.delegate = delegate;
  }
 
+ @Override
+ public int getDefaultInitialCapacity() {
+ return delegate.getDefaultInitialCapacity();
+ }
+
+ @Override
+ public DataBufferFactory setDefaultInitialCapacity(int defaultInitialCapacity) {
+ delegate.setDefaultInitialCapacity(defaultInitialCapacity);
+ return this;
+ }
+
  /**
  * Checks whether all the data buffers allocated by this factory have also been released. If not,
  * then an {@link AssertionError} is thrown. Typically used from a JUnit <em>after</em> method.