CentralContainer.java

// Copyright 2016 Google, Inc.
//
// 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.firebase.jobdispatcher.testapp;

import android.content.Context;
import android.support.annotation.NonNull;
import android.util.Log;
import com.firebase.jobdispatcher.Driver;
import com.firebase.jobdispatcher.FirebaseJobDispatcher;
import com.firebase.jobdispatcher.GooglePlayDriver;
import com.firebase.jobdispatcher.Job;
import com.firebase.jobdispatcher.JobParameters;
import com.firebase.jobdispatcher.JobValidator;
import java.util.Iterator;

public final class CentralContainer {
    private static JobStore sStore;

    private static boolean sInitialized = false;
    private final static Object sLock = new Object();
    private static FirebaseJobDispatcher sDispatcher;

    public static void init(Context ctx) {
        if (!sInitialized) {
            synchronized (sLock) {
                if (!sInitialized) {
                    initLocked(ctx);
                }
            }
        }
    }

    private static void initLocked(Context ctx) {
        sStore = new JobStore();
        sDispatcher = new FirebaseJobDispatcher(new GooglePlayDriver(ctx));

        sInitialized = true;
    }

    public static JobStore getStore(Context ctx) {
        init(ctx);

        return sStore;
    }

    public static FirebaseJobDispatcher getDispatcher(Context ctx) {
        init(ctx);

        return sDispatcher;
    }

    private static class TrackingBackend implements Driver {
        private final Driver mDriver;
        private final JobStore mStore;

        public TrackingBackend(Driver backend, JobStore store) {
            mDriver = backend;
            mStore = store;
        }

        @Override
        public int schedule(@NonNull Job job) {
            Log.i("TrackingBackend", "beginning schedule loop");

            synchronized (mStore) {
                final Iterator<JobHistory> it = mStore.iterator();
                while (it.hasNext()) {
                    JobParameters j = it.next().job;

                    if (j.getTag().equals(job.getTag()) && j.getService().equals(job.getService())) {
                        it.remove();
                    }
                }

                mStore.add(new JobHistory(job));
            }

            Log.i("TrackingBackend", "ending schedule loop");

            return mDriver.schedule(job);
        }

        @Override
        public int cancel(@NonNull String tag) {
            synchronized (mStore) {
                final Iterator<JobHistory> it = mStore.iterator();
                while (it.hasNext()) {
                    JobParameters j = it.next().job;
                    if (tag == null || tag.equals(j.getTag())) {
                        it.remove();
                        break;
                    }
                }

                return mDriver.cancel(tag);
            }
        }

        @Override
        public int cancelAll() {
            return mDriver.cancelAll();
        }

        @NonNull
        @Override
        public JobValidator getValidator() {
            return mDriver.getValidator();
        }

        @Override
        public boolean isAvailable() {
            return mDriver.isAvailable();
        }
    }
}