Feature #11788 ContextManager class added
git-svn-id: http://svn.research-infrastructures.eu/public/d4science/gcube/trunk/portlets/admin/rmp-common-library@167595 82a268e6-3cf1-43bd-a215-b396298e98cfFeature/25384
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/****************************************************************************
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* This software is part of the gCube Project.
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* Site: http://www.gcube-system.org/
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****************************************************************************
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* The gCube/gCore software is licensed as Free Open Source software
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* conveying to the EUPL (http://ec.europa.eu/idabc/eupl).
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* The software and documentation is provided by its authors/distributors
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* "as is" and no expressed or
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* implied warranty is given for its use, quality or fitness for a
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* particular case.
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****************************************************************************
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* Filename: ContextManager.java
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****************************************************************************
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* @author <a href="mailto:massimiliano.assante@isti.cnr.it">Massimiliano Assante</a>
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***************************************************************************/
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package org.gcube.resourcemanagement.support.server.managers.context;
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import static org.gcube.common.authorization.client.Constants.authorizationService;
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import static org.gcube.resources.discovery.icclient.ICFactory.clientFor;
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import static org.gcube.resources.discovery.icclient.ICFactory.queryFor;
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import java.io.ByteArrayInputStream;
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import java.io.IOException;
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import java.io.StringWriter;
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import java.util.ArrayList;
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import java.util.LinkedHashMap;
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import java.util.List;
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import java.util.Map;
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import javax.xml.parsers.DocumentBuilder;
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import javax.xml.parsers.DocumentBuilderFactory;
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import javax.xml.parsers.ParserConfigurationException;
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import javax.xml.transform.Transformer;
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import javax.xml.transform.TransformerFactory;
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import javax.xml.transform.dom.DOMSource;
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import javax.xml.transform.stream.StreamResult;
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import org.gcube.common.authorization.library.AuthorizationEntry;
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import org.gcube.common.authorization.library.provider.SecurityTokenProvider;
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import org.gcube.common.resources.gcore.GenericResource;
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import org.gcube.common.scope.api.ScopeProvider;
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import org.gcube.common.scope.impl.ScopeBean;
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import org.gcube.resourcemanagement.support.server.utils.ServerConsole;
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import org.gcube.resources.discovery.client.api.DiscoveryClient;
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import org.gcube.resources.discovery.client.queries.api.SimpleQuery;
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import org.w3c.dom.Document;
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import org.w3c.dom.NodeList;
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import org.xml.sax.SAXException;
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/**
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* Context and their maps are persisted in this structure.
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*
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* @author Massimiliano Assante (ISTI-CNR)
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*
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*/
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public class ContextManager {
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private static final Map<String, ScopeBean> CONTEXTS = new LinkedHashMap<String, ScopeBean>();
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private static String confFile = null;
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private static final String LOG_PREFIX = "[SCOPE-MGR]";
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private static final String GEN_RESOURCE_TYPE = "INFRASTRUCTURE";
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private static final String GEN_RESOURCE_NAME = "VirtualOrganisation";
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public static ScopeBean getContext(final String context) throws Exception {
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synchronized (CONTEXTS) {
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if (getAvailableContexts().containsKey(context)) {
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return getAvailableContexts().get(context);
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}
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}
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ServerConsole.warn(LOG_PREFIX, "Using DEFAULT context manager");
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return new ScopeBean(context);
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}
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/**
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* Refreshes the list of scopes and associated maps.
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*/
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public static Map<String, ScopeBean> getAvailableContexts()
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throws Exception {
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if (CONTEXTS.size() == 0) {
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update();
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}
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return CONTEXTS;
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}
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public static void clear() {
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CONTEXTS.clear();
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}
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public static void update() throws Exception {
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if (confFile == null) {
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throw new NullPointerException("the context file has not been defined");
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}
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LinkedHashMap<String, ScopeBean> toCopy = readContexts();
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for (String key : toCopy.keySet()) {
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CONTEXTS.put(key, toCopy.get(key));
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}
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}
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/**
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*
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* @param confFile
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* @return
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* @throws Exception
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*/
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public static LinkedHashMap<String, ScopeBean> readContexts() throws Exception {
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LinkedHashMap<String, ScopeBean> toReturn = new LinkedHashMap<String, ScopeBean>();
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String scopeXML = readInfraVoFromIS();
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Document scopeDocument = getDocumentGivenXML(scopeXML);
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NodeList voElements = scopeDocument.getElementsByTagName("vo");
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System.out.println("voElements="+ voElements.getLength());
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for (int i = 0; i < voElements.getLength(); i++) {
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NodeList voDetails = voElements.item(i).getChildNodes();
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String voString = voDetails.item(2).getFirstChild().getNodeValue();
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ScopeBean vo = new ScopeBean(voString);
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toReturn.put(vo.toString(), vo);
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try {
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for (String vre : getVREFromVO(vo)) {
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// This operation overrides the vo map
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toReturn.put(vre.toString(), new ScopeBean(vo.toString()+"/"+vre));
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}
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} catch (Exception e) {
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ServerConsole.error("Exception raised while loading VREs for VO : " + vo, e);
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}
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}
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return toReturn;
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}
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/**
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* query the IS to get the VRE list given a VO
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* @param vo
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* @return
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* @throws Exception
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*/
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protected static List<String> getVREFromVO(final ScopeBean vo) throws Exception {
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ServerConsole.info(LOG_PREFIX, "Starting Retrieving VREs for VO : " + vo);
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List<String> toReturn = new ArrayList<String>();
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ScopeProvider.instance.set(vo.toString());
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SimpleQuery query = queryFor(GenericResource.class);
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query.addCondition("$resource/Profile/SecondaryType/text() eq 'VRE'");
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DiscoveryClient<GenericResource> client = clientFor(GenericResource.class);
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List<GenericResource> gRes = client.submit(query);
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for (GenericResource res : gRes) {
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ServerConsole.info(LOG_PREFIX, "Found: " + res.profile().name());
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toReturn.add(res.profile().name());
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}
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return toReturn;
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}
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/**
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* Given a context, if it is a VO or an infrastructure, the corresponding
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* map file is retrieved from the globus location and the contained xml
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* representation is returned.
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* @param searchvo
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* @return
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* @throws Exception
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*/
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public static String getMapXML(final ScopeBean searchvo) throws Exception {
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if (confFile == null) {
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throw new NullPointerException("the context file has not been defined");
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}
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String scopeXML = readInfraVoFromIS();
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ServerConsole.info(LOG_PREFIX, "Starting retrieving scopes..");
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Document scopeDocument = getDocumentGivenXML(scopeXML);
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NodeList voElements = scopeDocument.getElementsByTagName("vo");
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for (int i = 0; i < voElements.getLength(); i++) {
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NodeList voDetails = voElements.item(i).getChildNodes();
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String voString = voDetails.item(5).getFirstChild().getNodeValue();
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String fileName = voDetails.item(3).getFirstChild().getNodeValue();
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// String voName = voDetails.item(1).getFirstChild().getNodeValue();
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ScopeBean vo = new ScopeBean(voString);
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if (vo.equals(searchvo)) {
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return readInfraVoFromIS();
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}
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}
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ServerConsole.error(LOG_PREFIX, "*** maps for " + searchvo + " not found");
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return null;
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}
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// private static ServiceMap loadServiceMap(final VO vo, final String fileName) throws Exception {
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// ServiceMap map = new ServiceMap();
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// String filePath = System.getenv("GLOBUS_LOCATION") + File.separator + "config" + File.separator + fileName;
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// ServerConsole.info(LOG_PREFIX, "--- Loading " + vo.getName() + " from: " + filePath);
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// map.load(new FileReader(filePath));
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// return map;
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// }
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private static String readInfraVoFromIS() throws Exception {
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String context = "";
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String token = SecurityTokenProvider.instance.get();
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if (token == null || token.compareTo("") == 0) {
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ServerConsole.warn(LOG_PREFIX, "SecurityTokenProvider returned empty token, trying with ScopeProvider ...");
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context = ScopeProvider.instance.get();
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if (context == null || context.compareTo("") == 0) {
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ServerConsole.error(LOG_PREFIX, "ScopeProvider returned empty context, exiting ...");
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return null;
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}
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} else { //there is a token
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ServerConsole.debug(LOG_PREFIX, "SecurityTokenProvider token found");
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AuthorizationEntry entry = authorizationService().get(token);
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context = entry.getContext();
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}
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String[] splits = context.split("/");
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if (splits.length < 2)
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throw new IllegalArgumentException("The context found is malformed: " + context);
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String infraScope = "/"+splits[1];
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ScopeProvider.instance.set(infraScope);
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SimpleQuery query = queryFor(GenericResource.class);
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query.addCondition("$resource/Profile/SecondaryType/text() eq '"+ GEN_RESOURCE_TYPE +"'");
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query.addCondition("$resource/Profile/Name/text() eq '"+ GEN_RESOURCE_NAME +"'");
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DiscoveryClient<GenericResource> client = clientFor(GenericResource.class);
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try {
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List<GenericResource> list = client.submit(query);
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if (list.size() > 1) {
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System.out.println("Too many Generic Resources having name " + GEN_RESOURCE_NAME +" in this context having Type " + GEN_RESOURCE_TYPE);
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}
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else if (list.size() == 0){
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System.out.println("There is no Generic Resources having name " + GEN_RESOURCE_NAME +" in this context having Type " + GEN_RESOURCE_TYPE);
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}
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else {
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for (GenericResource res : list) {
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TransformerFactory transformerFactory = TransformerFactory.newInstance();
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Transformer transformer = transformerFactory.newTransformer();
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DOMSource source = new DOMSource(res.profile().body());
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StreamResult result = new StreamResult(new StringWriter());
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transformer.transform(source, result);
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return result.getWriter().toString();
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}
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}
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}catch (Exception e) {
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e.printStackTrace();
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}
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//set back the context
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ScopeProvider.instance.set(context);
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return "";
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}
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public static Document getDocumentGivenXML(final String result) {
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DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
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dbf.setValidating(false);
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DocumentBuilder db;
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Document document = null;
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try {
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db = dbf.newDocumentBuilder();
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document = db.parse(new ByteArrayInputStream(result.getBytes()));
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} catch (ParserConfigurationException e1) {
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e1.printStackTrace();
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} catch (SAXException e) {
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e.printStackTrace();
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} catch (IOException e) {
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e.printStackTrace();
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}
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return document;
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}
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}
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