387 lines
12 KiB
Java
387 lines
12 KiB
Java
/**
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*
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*/
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package org.gcube.informationsystem.resourceregistry.client.proxy;
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import java.io.BufferedReader;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.InputStreamReader;
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import java.io.StringWriter;
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import java.io.UnsupportedEncodingException;
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import java.net.HttpURLConnection;
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import java.net.URL;
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import java.net.URLEncoder;
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import java.util.List;
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import java.util.Map;
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import java.util.UUID;
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import javax.xml.ws.EndpointReference;
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import org.gcube.common.authorization.client.Constants;
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import org.gcube.common.authorization.library.provider.SecurityTokenProvider;
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import org.gcube.common.clients.Call;
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import org.gcube.common.clients.delegates.AsyncProxyDelegate;
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import org.gcube.common.clients.delegates.ProxyDelegate;
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import org.gcube.common.scope.api.ScopeProvider;
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import org.gcube.informationsystem.impl.utils.Entities;
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import org.gcube.informationsystem.model.entity.Facet;
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import org.gcube.informationsystem.model.entity.Resource;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.InvalidQueryException;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.ResourceRegistryException;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.FacetNotFoundException;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.entity.ResourceNotFoundException;
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import org.gcube.informationsystem.resourceregistry.api.exceptions.schema.SchemaNotFoundException;
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import org.gcube.informationsystem.resourceregistry.api.rest.AccessPath;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* @author Luca Frosini (ISTI - CNR)
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*
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*/
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public class ResourceRegistryClientImpl implements ResourceRegistryClient {
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private static final Logger logger = LoggerFactory
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.getLogger(ResourceRegistryClientImpl.class);
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private final AsyncProxyDelegate<EndpointReference> delegate;
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public static final String PATH_SEPARATOR = "/";
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public final class RREntry<K, V> implements Map.Entry<K, V> {
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private final K key;
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private V value;
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public RREntry(K key, V value) {
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this.key = key;
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this.value = value;
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}
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@Override
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public K getKey() {
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return key;
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}
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@Override
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public V getValue() {
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return value;
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}
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@Override
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public V setValue(V value) {
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V old = this.value;
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this.value = value;
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return old;
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}
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}
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public ResourceRegistryClientImpl(ProxyDelegate<EndpointReference> config) {
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this.delegate = new AsyncProxyDelegate<EndpointReference>(config);
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}
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protected enum HTTPMETHOD {
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GET, POST, PUT, DELETE;
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@Override
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public String toString(){
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return this.name();
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}
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}
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class HTTPInputs {
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public static final String PARAM_STARTER = "?";
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public static final String PARAM_EQUALS = "=";
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public static final String PARAM_SEPARATOR = "&";
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public static final String UTF8 = "UTF-8";
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protected final String path;
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protected final HTTPMETHOD method;
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protected final String urlParameters;
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protected String getParametersDataString(List<Map.Entry<String, String>> parameters) throws UnsupportedEncodingException {
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if(parameters==null){
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return null;
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}
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StringBuilder result = new StringBuilder();
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boolean first = true;
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for(Map.Entry<String, String> entry : parameters){
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if (first) {
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first = false;
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} else {
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result.append(PARAM_SEPARATOR);
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}
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result.append(URLEncoder.encode(entry.getKey(), UTF8));
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result.append(PARAM_EQUALS);
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result.append(URLEncoder.encode(entry.getValue(), UTF8));
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}
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return result.toString();
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}
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/**
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* @param path
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* @param method
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* @param requestProperties
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* @throws UnsupportedEncodingException
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*/
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public HTTPInputs(String path, HTTPMETHOD method,
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List<Map.Entry<String, String>> parameters) throws UnsupportedEncodingException {
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super();
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this.path = path;
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this.method = method;
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this.urlParameters = getParametersDataString(parameters);
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}
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/**
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* @return the path
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*/
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public String getPath() {
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return path;
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}
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/**
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* @return the method
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*/
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public HTTPMETHOD getMethod() {
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return method;
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}
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/**
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* @return the urlParameters
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*/
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public String getUrlParameters() {
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return urlParameters;
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}
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}
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class ResourceRegistryCall<C> implements Call<EndpointReference, C> {
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protected final Class<C> clazz;
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protected final HTTPInputs httpInputs;
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public ResourceRegistryCall(Class<C> clazz, HTTPInputs httpInputs) {
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this.clazz = clazz;
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this.httpInputs = httpInputs;
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}
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protected String getURLStringFromEndpointReference(
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EndpointReference endpoint) throws IOException {
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JaxRSEndpointReference jaxRSEndpointReference = new JaxRSEndpointReference(
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endpoint);
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return jaxRSEndpointReference.toString();
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}
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protected HttpURLConnection getConnection(URL url, HTTPMETHOD method)
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throws Exception {
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/*
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if(method!=HTTPMETHOD.POST && httpInputs.getUrlParameters()!=null){
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*/
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url = new URL(url + "?" + httpInputs.getUrlParameters());
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//}
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HttpURLConnection connection = (HttpURLConnection) url
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.openConnection();
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if (SecurityTokenProvider.instance.get() == null) {
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if (ScopeProvider.instance.get() == null) {
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throw new RuntimeException(
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"Null Token and Scope. Please set your token first.");
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}
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connection.setRequestProperty("gcube-scope",
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ScopeProvider.instance.get());
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} else {
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connection.setRequestProperty(Constants.TOKEN_HEADER_ENTRY,
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SecurityTokenProvider.instance.get());
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}
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connection.setDoOutput(true);
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connection.setRequestProperty("Content-type", "text/plain");
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connection.setRequestProperty("User-Agent", ResourceRegistryClient.class.getSimpleName());
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connection.setRequestMethod(method.toString());
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/*
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if(method==HTTPMETHOD.POST){
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connection.setDoOutput(true);
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DataOutputStream wr = new DataOutputStream(connection.getOutputStream());
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wr.writeBytes(httpInputs.getUrlParameters());
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wr.flush();
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wr.close();
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}*/
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return connection;
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}
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@SuppressWarnings("unchecked")
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@Override
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public C call(EndpointReference endpoint) throws Exception {
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String urlFromEndpointReference = getURLStringFromEndpointReference(endpoint);
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StringBuilder callUrl = new StringBuilder(urlFromEndpointReference);
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callUrl.append(httpInputs.getPath());
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URL url = new URL(callUrl.toString());
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HttpURLConnection connection = getConnection(url, httpInputs.method);
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logger.debug("Response code for {} is {} : {}",
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connection.getURL(),
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connection.getResponseCode(),
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connection.getResponseMessage());
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if (connection.getResponseCode() != HttpURLConnection.HTTP_OK) {
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throw new Exception(
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"Error Contacting Resource Registry Service");
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}
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StringBuilder result = new StringBuilder();
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try (BufferedReader reader = new BufferedReader(
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new InputStreamReader((InputStream) connection.getContent()))) {
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String line;
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while ((line = reader.readLine()) != null) {
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result.append(line);
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}
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}
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String res = result.toString();
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logger.trace("Server returned content : {}", res);
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if(String.class.isAssignableFrom(clazz)){
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return (C) res;
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}
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return Entities.unmarshal(clazz, res);
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}
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}
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@Override
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public Facet getFacet(UUID uuid)
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throws FacetNotFoundException, ResourceRegistryException {
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return getFacet(Facet.class, uuid);
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}
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@Override
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public <F extends Facet> F getFacet(Class<F> clazz, UUID uuid)
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throws FacetNotFoundException, ResourceRegistryException {
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try {
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StringWriter stringWriter = new StringWriter();
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stringWriter.append(PATH_SEPARATOR);
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stringWriter.append(AccessPath.ACCESS_PATH_PART);
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stringWriter.append(PATH_SEPARATOR);
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stringWriter.append(AccessPath.FACET_PATH_PART);
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stringWriter.append(PATH_SEPARATOR);
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stringWriter.append(AccessPath.INSTANCE_PATH_PART);
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stringWriter.append(PATH_SEPARATOR);
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stringWriter.append(uuid.toString());
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HTTPInputs httpInputs = new HTTPInputs(stringWriter.toString(), HTTPMETHOD.GET, null);
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ResourceRegistryCall<F> call = new ResourceRegistryCall<>(clazz, httpInputs);
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return delegate.make(call);
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} catch (Exception e) {
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logger.error("Error getting {} with UUID {}", Facet.class.getSimpleName(), uuid, e);
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throw new ResourceRegistryException(e);
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}
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}
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@Override
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public String getFacetSchema(String facetType)
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throws SchemaNotFoundException {
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try {
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StringWriter stringWriter = new StringWriter();
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stringWriter.append(PATH_SEPARATOR);
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stringWriter.append(AccessPath.ACCESS_PATH_PART);
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stringWriter.append(PATH_SEPARATOR);
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stringWriter.append(AccessPath.FACET_PATH_PART);
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stringWriter.append(PATH_SEPARATOR);
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stringWriter.append(AccessPath.SCHEMA_PATH_PART);
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stringWriter.append(PATH_SEPARATOR);
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stringWriter.append(facetType);
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HTTPInputs httpInputs = new HTTPInputs(stringWriter.toString(), HTTPMETHOD.GET, null);
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ResourceRegistryCall<String> call = new ResourceRegistryCall<>(String.class, httpInputs);
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return delegate.make(call);
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} catch (Exception e) {
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logger.error("Error getting {} Schema for {}", Facet.class.getSimpleName(), facetType, e);
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throw new SchemaNotFoundException(e);
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}
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}
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@Override
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public Resource getResource(UUID uuid)
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throws ResourceNotFoundException, ResourceRegistryException {
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return getResource(Resource.class, uuid);
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}
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@Override
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public <R extends Resource> R getResource(Class<R> clazz, UUID uuid)
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throws ResourceNotFoundException, ResourceRegistryException {
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try {
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StringWriter stringWriter = new StringWriter();
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stringWriter.append(PATH_SEPARATOR);
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stringWriter.append(AccessPath.ACCESS_PATH_PART);
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stringWriter.append(PATH_SEPARATOR);
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stringWriter.append(AccessPath.RESOURCE_PATH_PART);
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stringWriter.append(PATH_SEPARATOR);
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stringWriter.append(AccessPath.INSTANCE_PATH_PART);
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stringWriter.append(PATH_SEPARATOR);
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stringWriter.append(uuid.toString());
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HTTPInputs httpInputs = new HTTPInputs(stringWriter.toString(), HTTPMETHOD.GET, null);
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ResourceRegistryCall<R> call = new ResourceRegistryCall<>(clazz, httpInputs);
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return delegate.make(call);
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} catch (Exception e) {
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logger.error("Error getting {} with UUID {}", Resource.class.getSimpleName(), uuid, e);
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throw new ResourceRegistryException(e);
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}
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}
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@Override
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public String getResourceSchema(String resourceType)
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throws SchemaNotFoundException {
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try {
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StringWriter stringWriter = new StringWriter();
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stringWriter.append(PATH_SEPARATOR);
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stringWriter.append(AccessPath.ACCESS_PATH_PART);
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stringWriter.append(PATH_SEPARATOR);
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stringWriter.append(AccessPath.RESOURCE_PATH_PART);
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stringWriter.append(PATH_SEPARATOR);
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stringWriter.append(AccessPath.SCHEMA_PATH_PART);
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stringWriter.append(PATH_SEPARATOR);
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stringWriter.append(resourceType);
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HTTPInputs httpInputs = new HTTPInputs(stringWriter.toString(), HTTPMETHOD.GET, null);
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ResourceRegistryCall<String> call = new ResourceRegistryCall<>(String.class, httpInputs);
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return delegate.make(call);
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} catch (Exception e) {
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logger.error("Error getting {} Schema for {}", Resource.class.getSimpleName(), resourceType, e);
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throw new SchemaNotFoundException(e);
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}
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}
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/* (non-Javadoc)
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* @see org.gcube.informationsystem.resourceregistry.client.proxy.ResourceRegistryClient#query(java.lang.String, int, java.lang.String)
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*/
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@Override
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public String query(String query, int limit, String fetchPlan)
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throws InvalidQueryException {
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ResourceRegistryQuery rrq = new ResourceRegistryQuery(delegate);
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return rrq.query(query, limit, fetchPlan);
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}
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}
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