org.mythtv.service.myth.v25.HostHelperV25.java Source code

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Here is the source code for org.mythtv.service.myth.v25.HostHelperV25.java

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/**
 * This file is part of MythTV Android Frontend
 *
 * MythTV Android Frontend is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * MythTV Android Frontend is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with MythTV Android Frontend.  If not, see <http://www.gnu.org/licenses/>.
 *
 * This software can be found at <https://github.com/MythTV-Clients/MythTV-Android-Frontend/>
 */
/**
 * 
 */
package org.mythtv.service.myth.v25;

import java.util.ArrayList;
import java.util.List;

import org.mythtv.client.ui.preferences.LocationProfile;
import org.mythtv.db.AbstractBaseHelper;
import org.mythtv.service.util.NetworkHelper;
import org.mythtv.services.api.ApiVersion;
import org.mythtv.services.api.ETagInfo;
import org.mythtv.services.api.MythServiceApiRuntimeException;
import org.mythtv.services.api.connect.MythAccessFactory;
import org.mythtv.services.api.v025.MythServicesTemplate;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;

import android.content.Context;
import android.content.OperationApplicationException;
import android.os.RemoteException;
import android.util.Log;

/**
 * @author Daniel Frey
 *
 */
public class HostHelperV25 extends AbstractBaseHelper {

    private static final String TAG = HostHelperV25.class.getSimpleName();

    private static final ApiVersion mApiVersion = ApiVersion.v025;

    private static MythServicesTemplate mMythServicesTemplate;

    private static HostHelperV25 singleton;

    /**
     * Returns the one and only HostHelperV25. init() must be called before 
     * any 
     * @return
     */
    public static HostHelperV25 getInstance() {
        if (null == singleton) {

            synchronized (HostHelperV25.class) {

                if (null == singleton) {
                    singleton = new HostHelperV25();
                }

            }

        }

        return singleton;
    }

    /**
     * Constructor. No one but getInstance() can do this.
     */
    private HostHelperV25() {
    }

    public List<String> process(final Context context, final LocationProfile locationProfile) {
        Log.v(TAG, "process : enter");

        if (!NetworkHelper.getInstance().isMasterBackendConnected(context, locationProfile)) {
            Log.w(TAG, "process : Master Backend '" + locationProfile.getHostname() + "' is unreachable");

            return null;
        }

        mMythServicesTemplate = (MythServicesTemplate) MythAccessFactory.getServiceTemplateApiByVersion(mApiVersion,
                locationProfile.getUrl());
        if (null == mMythServicesTemplate) {
            Log.w(TAG, "process : Master Backend '" + locationProfile.getHostname() + "' is unreachable");

            return null;
        }

        List<String> hosts = null;

        try {

            hosts = downloadHosts(locationProfile);

        } catch (Exception e) {
            Log.e(TAG, "process : error", e);

            hosts = null;
        }

        Log.v(TAG, "process : exit");
        return hosts;
    }

    // internal helpers

    private List<String> downloadHosts(final LocationProfile locationProfile)
            throws MythServiceApiRuntimeException, RemoteException, OperationApplicationException {
        Log.v(TAG, "downloadHosts : enter");

        List<String> hosts = null;

        ResponseEntity<org.mythtv.services.api.ArrayOfString> responseEntity = mMythServicesTemplate
                .mythOperations().getHosts(ETagInfo.createEmptyETag());

        if (responseEntity.getStatusCode().equals(HttpStatus.OK)) {

            org.mythtv.services.api.ArrayOfString hostList = responseEntity.getBody();

            if (null != hostList.getValue() && hostList.getValue().length > 0) {
                hosts = load(hostList);
            }

        }

        Log.v(TAG, "downloadHosts : exit");
        return hosts;
    }

    private List<String> load(org.mythtv.services.api.ArrayOfString versionHosts) {
        Log.v(TAG, "load : enter");

        List<String> hosts = new ArrayList<String>();

        if (null != versionHosts) {

            for (String versionHost : versionHosts.getValue()) {

                hosts.add(versionHost);

            }

        }

        Log.v(TAG, "load : exit");
        return hosts;
    }

}