/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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 org.apache.ambari.server.state.stack;
import java.io.File;
import java.io.FileReader;
import java.io.InputStreamReader;
import java.lang.reflect.Type;
import java.net.URI;
import java.util.Map;
import java.util.concurrent.Callable;
import org.apache.ambari.server.controller.internal.URLStreamProvider;
import org.apache.ambari.server.state.RepositoryInfo;
import org.apache.ambari.server.state.StackInfo;
import org.apache.http.client.utils.URIBuilder;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;
/**
* Encapsulates the work to resolve the latest repo information for a stack.
* This class must be used AFTER the stack has created its owned repositories.
*/
public class LatestRepoCallable implements Callable<Void> {
private static final int LOOKUP_CONNECTION_TIMEOUT = 2000;
private static final int LOOKUP_READ_TIMEOUT = 1000;
private final static Logger LOG = LoggerFactory.getLogger(LatestRepoCallable.class);
private String sourceUri = null;
private File stackRepoFolder = null;
private StackInfo stack = null;
public LatestRepoCallable(String latestSourceUri, File stackRepoFolder, StackInfo stack) {
this.sourceUri = latestSourceUri;
this.stackRepoFolder = stackRepoFolder;
this.stack = stack;
}
@Override
public Void call() throws Exception {
Type type = new TypeToken<Map<String, Map<String, Object>>>(){}.getType();
Gson gson = new Gson();
Map<String, Map<String, Object>> latestUrlMap = null;
try {
if (sourceUri.startsWith("http")) {
URLStreamProvider streamProvider = new URLStreamProvider(
LOOKUP_CONNECTION_TIMEOUT, LOOKUP_READ_TIMEOUT,
null, null, null);
LOG.info("Loading latest URL info from " + sourceUri);
latestUrlMap = gson.fromJson(new InputStreamReader(
streamProvider.readFrom(sourceUri)), type);
} else {
File jsonFile = null;
if (sourceUri.charAt(0) == '.') {
jsonFile = new File(stackRepoFolder, sourceUri);
} else {
jsonFile = new File(sourceUri);
}
if (jsonFile.exists()) {
LOG.info("Loading latest URL info from " + jsonFile);
latestUrlMap = gson.fromJson(new FileReader(jsonFile), type);
}
}
} catch (Exception e) {
LOG.error("Could not load the URI " + sourceUri + " (" + e.getMessage() + ")");
throw e;
}
if (null != latestUrlMap) {
for (RepositoryInfo ri : stack.getRepositories()) {
if (latestUrlMap.containsKey(ri.getRepoId())) {
Map<String, Object> valueMap = latestUrlMap.get(ri.getRepoId());
if (valueMap.containsKey("latest")) {
@SuppressWarnings("unchecked")
Map<String, String> osMap = (Map<String, String>) valueMap.get("latest");
String baseUrl = resolveOsUrl(ri.getOsType(), osMap);
if (null != baseUrl) {
// !!! in the case where <name>.repo is defined with the base url, strip that off.
// Agents do the reverse action (take the base url, and append <name>.repo)
String repoFileName = stack.getName().toLowerCase() + ".repo";
int idx = baseUrl.toLowerCase().indexOf(repoFileName);
if (-1 != idx && baseUrl.toLowerCase().endsWith(repoFileName)) {
baseUrl = baseUrl.substring(0, idx);
}
if ('/' == baseUrl.charAt(baseUrl.length()-1)) {
baseUrl = baseUrl.substring(0, baseUrl.length()-1);
}
ri.setLatestBaseUrl(baseUrl);
}
}
}
}
}
return null;
}
/**
* Resolves a base url given that certain OS types can be used interchangeably.
* @param os the target os to find
* @param osMap the map of os-to-baseurl
* @return the url for an os.
*/
private String resolveOsUrl(String os, Map<String, String> osMap) {
// !!! look for the OS directly
if (osMap.containsKey(os))
return osMap.get(os);
// !!! os not found, find and return the first compatible one
String[] possibleTypes = OsFamily.findTypes(os);
for (String type : possibleTypes) {
if (osMap.containsKey(type))
return osMap.get(type);
}
return null;
}
}