/*
*
* Copyright 2013 Netflix, 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.netflix.ice.basic;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.ObjectMetadata;
import com.google.common.collect.Maps;
import com.netflix.ice.common.AwsUtils;
import com.netflix.ice.reader.ApplicationGroup;
import com.netflix.ice.reader.ApplicationGroupService;
import com.netflix.ice.reader.ReaderConfig;
import org.apache.commons.io.IOUtils;
import org.json.JSONException;
import org.json.JSONObject;
import org.json.JSONTokener;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.ByteArrayInputStream;
import java.io.InputStream;
import java.util.Iterator;
import java.util.Map;
public class BasicS3ApplicationGroupService implements ApplicationGroupService {
private final static Logger logger = LoggerFactory.getLogger(BasicS3ApplicationGroupService.class);
private AmazonS3Client s3Client;
private ReaderConfig config;
public void init() {
this.config = ReaderConfig.getInstance();
s3Client = AwsUtils.getAmazonS3Client();
}
private String getJson(Map<String, ApplicationGroup> appgroups) throws JSONException {
JSONObject json = new JSONObject();
for (String name: appgroups.keySet()) {
ApplicationGroup appgroup = appgroups.get(name);
json.put(name, appgroup.getJSON());
}
return json.toString();
}
public Map<String, ApplicationGroup> getApplicationGroups() {
String jsonStr;
try {
InputStream in = s3Client.getObject(config.workS3BucketName, config.workS3BucketPrefix + "appgroups").getObjectContent();
jsonStr = IOUtils.toString(in);
in.close();
}
catch (Exception e) {
logger.error("Error reading from appgroups file", e);
try {
InputStream in = s3Client.getObject(config.workS3BucketName, config.workS3BucketPrefix + "copy_appgroups").getObjectContent();
jsonStr = IOUtils.toString(in);
in.close();
}
catch (Exception r) {
logger.error("Error reading from copy_appgroups file", r);
return Maps.newHashMap();
}
}
try {
JSONObject json = new JSONObject(new JSONTokener(jsonStr));
Map<String, ApplicationGroup> appgroups = Maps.newHashMap();
Iterator<String> keys = json.keys();
while (keys.hasNext()) {
String key = keys.next();
String str = json.getString(key);
appgroups.put(key, new ApplicationGroup(str));
}
return appgroups;
}
catch (JSONException e) {
logger.error("Error reading appgroups from json...", e);
return Maps.newHashMap();
}
}
public ApplicationGroup getApplicationGroup(String name) {
Map<String, ApplicationGroup> appgroups = getApplicationGroups();
return appgroups.get(name);
}
public boolean saveApplicationGroup(ApplicationGroup appgroup) {
Map<String, ApplicationGroup> appgroups = getApplicationGroups();
appgroups.put(appgroup.name, appgroup);
try {
String json = getJson(appgroups);
s3Client.putObject(config.workS3BucketName, config.workS3BucketPrefix + "appgroups", IOUtils.toInputStream(json), new ObjectMetadata());
s3Client.putObject(config.workS3BucketName, config.workS3BucketPrefix + "copy_appgroups", IOUtils.toInputStream(json), new ObjectMetadata());
BasicS3ApplicationGroupService.logger.info("saved appgroup " + appgroup);
return true;
}
catch (JSONException e) {
logger.error("Error saving appgroup " + appgroup, e);
return false;
}
}
public boolean deleteApplicationGroup(String name) {
Map<String, ApplicationGroup> appgroups = getApplicationGroups();
ApplicationGroup appgroup = appgroups.remove(name);
try {
String json = getJson(appgroups);
s3Client.putObject(config.workS3BucketName, config.workS3BucketPrefix + "appgroups", new ByteArrayInputStream(json.getBytes()), new ObjectMetadata());
BasicS3ApplicationGroupService.logger.info("delete appgroup " + name + " " + appgroup);
return true;
}
catch (JSONException e) {
logger.error("Error deleting appgroup " + appgroup, e);
return false;
}
}
}