Subversion Repositories SmartDukaan

/**

 * Copyright 2010-present Facebook.

 *

 * 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.facebook;

import android.os.Handler;

import java.io.FilterOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.util.Map;

class ProgressOutputStream extends FilterOutputStream implements RequestOutputStream {

    private final Map<Request, RequestProgress> progressMap;

    private final RequestBatch requests;

    private final long threshold;

    private long batchProgress, lastReportedProgress, maxProgress;

    private RequestProgress currentRequestProgress;

    ProgressOutputStream(OutputStream out, RequestBatch requests, Map<Request, RequestProgress> progressMap, long maxProgress) {

        super(out);

        this.requests = requests;

        this.progressMap = progressMap;

        this.maxProgress = maxProgress;

        this.threshold = Settings.getOnProgressThreshold();

    }

    private void addProgress(long size) {

        if (currentRequestProgress != null) {

            currentRequestProgress.addProgress(size);

        }

        batchProgress += size;

        if (batchProgress >= lastReportedProgress + threshold || batchProgress >= maxProgress) {

            reportBatchProgress();

        }

    }

    private void reportBatchProgress() {

        if (batchProgress > lastReportedProgress) {

            for (RequestBatch.Callback callback : requests.getCallbacks()) {

                if (callback instanceof RequestBatch.OnProgressCallback) {

                    final Handler callbackHandler = requests.getCallbackHandler();

                    // Keep copies to avoid threading issues

                    final RequestBatch.OnProgressCallback progressCallback = (RequestBatch.OnProgressCallback) callback;

                    if (callbackHandler == null) {

                        progressCallback.onBatchProgress(requests, batchProgress, maxProgress);

                    }

                    else {

                        callbackHandler.post(new Runnable() {

                            @Override

                            public void run() {

                                progressCallback.onBatchProgress(requests, batchProgress, maxProgress);

                            }

                        });

                    }

                }

            }

            lastReportedProgress = batchProgress;

        }

    }

    public void setCurrentRequest(Request request) {

        currentRequestProgress = request != null? progressMap.get(request) : null;

    }

    long getBatchProgress() {

        return batchProgress;

    }

    long getMaxProgress() {

        return maxProgress;

    }

    @Override

    public void write(byte[] buffer) throws IOException {

        out.write(buffer);

        addProgress(buffer.length);

    }

    @Override

    public void write(byte[] buffer, int offset, int length) throws IOException {

        out.write(buffer, offset, length);

        addProgress(length);

    }

    @Override

    public void write(int oneByte) throws IOException {

        out.write(oneByte);

        addProgress(1);

    }

    @Override

    public void close() throws IOException {

        super.close();

        for (RequestProgress p : progressMap.values()) {

            p.reportProgress();

        }

        reportBatchProgress();

    }

}