/**
* Copyright (C) 2010 Zhang, Guilin <guilin.zhang@hotmail.com>
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.google.code.http4j.impl.conn;
import java.io.DataInputStream;
import java.io.IOException;
import java.io.InputStream;
import com.google.code.http4j.utils.MetricsRecorder;
import com.google.code.http4j.utils.ThreadLocalMetricsRecorder;
/**
* This class does not totally matched the decorator, because only some of methods are delegated.
* So it is used within this package.
* @author <a href="mailto:guilin.zhang@hotmail.com">Zhang, Guilin</a>
*/
class InputStreamWrapper extends InputStream {
protected final DataInputStream in;
public InputStreamWrapper(InputStream in) {
this.in = new DataInputStream(in);
}
public int read() throws IOException {
MetricsRecorder recorder = ThreadLocalMetricsRecorder.getInstance();
int b = in.read();
if (recorder.getResponseTransportCounter().addAndGet(1L) == 1) {
recorder.getResponseTimer().start();
}
return b;
}
@Override
public int read(byte[] b) throws IOException {
return read(b, 0, b.length);
}
// Only be called while getting next chunk,
// so we do not need to worry about response timer start
public int read(byte[] b, int off, int len) throws IOException {
int read = super.read(b, off, len);
ThreadLocalMetricsRecorder.getInstance().getResponseTransportCounter().addAndGet((long) read);
return read;
}
}