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com.hazelcast.aws.utility.CloudyUtility Maven / Gradle / Ivy
/*
* Copyright (c) 2008-2013, Hazelcast, Inc. All Rights Reserved.
*
* 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.hazelcast.aws.utility;
import com.hazelcast.config.AbstractXmlConfigHelper;
import com.hazelcast.config.AwsConfig;
import com.hazelcast.impl.Util;
import com.hazelcast.logging.ILogger;
import com.hazelcast.logging.Logger;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.Node;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;
import static com.hazelcast.config.AbstractXmlConfigHelper.cleanNodeName;
public class CloudyUtility {
final static ILogger logger = Logger.getLogger(CloudyUtility.class.getName());
public static String getQueryString(Map attributes) {
StringBuilder query = new StringBuilder();
for (Iterator iterator = attributes.keySet().iterator(); iterator.hasNext(); ) {
String key = iterator.next();
String value = attributes.get(key);
query.append(AwsURLEncoder.urlEncode(key)).append("=").append(AwsURLEncoder.urlEncode(value)).append("&");
}
String result = query.toString();
if (result != null && !result.equals(""))
result = "?" + result.substring(0, result.length() - 1);
return result;
}
public static Object unmarshalTheResponse(InputStream stream, AwsConfig awsConfig) throws IOException {
Object o = parse(stream, awsConfig);
return o;
}
private static Object parse(InputStream in, AwsConfig awsConfig) {
final DocumentBuilder builder;
try {
builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
Document doc = builder.parse(in);
final ByteArrayOutputStream baos = new ByteArrayOutputStream();
Util.streamXML(doc, baos);
final byte[] bytes = baos.toByteArray();
// final ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
// Reader reader = new BufferedReader(new InputStreamReader(bais));
// int n;
// char[] buffer = new char[1024];
// Writer writer = new StringWriter();
// while ((n = reader.read(buffer)) != -1) {
// writer.write(buffer, 0, n);
// }
// System.out.println(writer.toString());
Element element = doc.getDocumentElement();
NodeHolder elementNodeHolder = new NodeHolder(element);
List names = new ArrayList();
List reservationset = elementNodeHolder.getSubNodes("reservationset");
for (NodeHolder reservation : reservationset) {
List items = reservation.getSubNodes("item");
for (NodeHolder item : items) {
NodeHolder instancesset = item.getSub("instancesset");
names.addAll(instancesset.getList("privateipaddress", awsConfig));
}
}
return names;
} catch (Exception e) {
logger.log(Level.WARNING, e.getMessage(), e);
}
return new ArrayList();
}
static class NodeHolder {
Node node;
public NodeHolder(Node node) {
this.node = node;
}
public NodeHolder getSub(String name) {
if (node != null) {
for (org.w3c.dom.Node node : new AbstractXmlConfigHelper.IterableNodeList(this.node.getChildNodes())) {
String nodeName = cleanNodeName(node.getNodeName());
if (name.equals(nodeName)) {
return new NodeHolder(node);
}
}
}
return new NodeHolder(null);
}
public List getSubNodes(String name) {
List list = new ArrayList();
if (node != null) {
for (org.w3c.dom.Node node : new AbstractXmlConfigHelper.IterableNodeList(this.node.getChildNodes())) {
String nodeName = cleanNodeName(node.getNodeName());
if (name.equals(nodeName)) {
list.add(new NodeHolder(node));
}
}
}
return list;
}
public List getList(String name, AwsConfig awsConfig) {
List list = new ArrayList();
if (node != null) {
for (org.w3c.dom.Node node : new AbstractXmlConfigHelper.IterableNodeList(this.node.getChildNodes())) {
String nodeName = cleanNodeName(node.getNodeName());
if ("item".equals(nodeName)) {
if (new NodeHolder(node).getSub("instancestate").getSub("name").getNode().getFirstChild().getNodeValue().equals("running")) {
String ip = new NodeHolder(node).getSub(name).getNode().getFirstChild().getNodeValue();
boolean passed = applyFilter(awsConfig, node);
if (ip != null && passed) {
list.add(ip);
}
}
}
}
}
return list;
}
private boolean applyFilter(AwsConfig awsConfig, Node node) {
boolean inGroup = applyFilter(node, awsConfig.getSecurityGroupName(), "groupset", "groupname");
return inGroup && applyTagFilter(node, awsConfig.getTagKey(), awsConfig.getTagValue());
}
private boolean applyFilter(Node node, String filter, String set, String filterField) {
boolean passed = (nullOrEmpty(filter));
if (!passed) {
for (NodeHolder group : new NodeHolder(node).getSub(set).getSubNodes("item")) {
NodeHolder nh = group.getSub(filterField);
if (nh != null && nh.getNode().getFirstChild() != null && filter.equals(nh.getNode().getFirstChild().getNodeValue())) {
passed = true;
}
}
}
return passed;
}
private boolean applyTagFilter(Node node, String keyExpected, String valueExpected) {
if (nullOrEmpty(keyExpected)) {
return true;
} else {
for (NodeHolder group : new NodeHolder(node).getSub("tagset").getSubNodes("item")) {
if (keyEquals(keyExpected, group) &&
(nullOrEmpty(valueExpected) || valueEquals(valueExpected, group))) {
return true;
}
}
return false;
}
}
private boolean valueEquals(String valueExpected, NodeHolder group) {
NodeHolder nhValue = group.getSub("value");
return nhValue != null && nhValue.getNode().getFirstChild() != null && valueExpected.equals(nhValue.getNode().getFirstChild().getNodeValue());
}
private boolean nullOrEmpty(String keyExpected) {
return keyExpected == null || keyExpected.equals("");
}
private boolean keyEquals(String keyExpected, NodeHolder group) {
NodeHolder nhKey = group.getSub("key");
return nhKey != null && nhKey.getNode().getFirstChild() != null && keyExpected.equals(nhKey.getNode().getFirstChild().getNodeValue());
}
public Node getNode() {
return node;
}
}
}
