474 lines
11 KiB
Java
474 lines
11 KiB
Java
package org.gcube.dataaccess.algorithms.drmalgorithms;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.LinkedHashMap;
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import java.util.List;
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import java.util.UUID;
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import org.gcube.common.scope.api.ScopeProvider;
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import org.gcube.contentmanagement.lexicalmatcher.utils.AnalysisLogger;
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import org.gcube.dataaccess.databases.access.DatabasesDiscoverer;
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import org.gcube.dataaccess.databases.resources.DBResource;
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import org.gcube.dataaccess.databases.utils.DatabaseManagement;
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import org.gcube.dataanalysis.ecoengine.datatypes.PrimitiveType;
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import org.gcube.dataanalysis.ecoengine.datatypes.StatisticalType;
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import org.gcube.dataanalysis.ecoengine.datatypes.enumtypes.PrimitiveTypes;
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import org.gcube.dataanalysis.ecoengine.interfaces.StandardLocalExternalAlgorithm;
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import org.gcube.resources.discovery.client.api.DiscoveryException;
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import org.gcube.resources.discovery.client.api.InvalidResultException;
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import org.hibernate.HibernateException;
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import org.hibernate.SessionFactory;
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/**
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* class that allows to retrieve schema's names of a chosen database. In this
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* case the database's type is "postgresql"
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*/
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public class ListSchemas extends StandardLocalExternalAlgorithm {
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private LinkedHashMap<String, StatisticalType> map = new LinkedHashMap<String, StatisticalType>();
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private DatabaseManagement mgt;
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// database's parameters specified by the user
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private String resourceName = null;
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private String databaseName = null;
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private SessionFactory sf;
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@Override
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public void init() throws Exception {
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mgt = new DatabaseManagement(config.getConfigPath());
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AnalysisLogger.getLogger().debug("In ListSchemas->Initialization");
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String scope = config.getGcubeScope();
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AnalysisLogger.getLogger().debug(
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"In ListSchemas->scope set by config object: " + scope);
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if (scope == null || scope.length() == 0) {
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scope = ScopeProvider.instance.get();
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AnalysisLogger.getLogger().debug(
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"In ListSchemas->scope set by ScopeProvider: " + scope);
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} else {
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ScopeProvider.instance.set(scope);
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}
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}
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@Override
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public String getDescription() {
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// add a simple description for the algorithm
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return "Algorithm that allows to view the schema names of a chosen database for which the type is Postgres";
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}
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@Override
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protected void process() throws Exception, IOException,
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IllegalStateException, DiscoveryException, InvalidResultException,
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HibernateException {
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AnalysisLogger.getLogger().debug("In ListSchemas->Processing");
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try {
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// retrieve information useful for connection
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List<String> Info = retrieveInfo();
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// create the connection
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getConnection(Info);
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// get the schema's list
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List<String> listSchemas = new ArrayList<String>();
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listSchemas = getSchemas();
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if (listSchemas.size() == 0) {
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AnalysisLogger.getLogger().debug(
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"In ListSchemas->Warning: no schema available");
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}
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for (int i = 0; i < listSchemas.size(); i++) {
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PrimitiveType val = new PrimitiveType(String.class.getName(),
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null, PrimitiveTypes.STRING, "schema's name",
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"schema's name");
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val.setContent(listSchemas.get(i));
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map.put(String.valueOf(i), val);
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// AnalysisLogger.getLogger().debug(
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// "In ListSchemas->getting schema's name: "
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// + val.getContent());
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}
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} catch (HibernateException h) {
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AnalysisLogger.getLogger().debug(
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"In ListSchemas-> ERROR " + h.getMessage());
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throw h;
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}
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catch (IllegalStateException e) {
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// e.printStackTrace();
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AnalysisLogger.getLogger().debug(
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"In ListSchemas-> ERROR " + e.getMessage());
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throw e;
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} catch (DiscoveryException e1) {
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// e1.printStackTrace();
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AnalysisLogger.getLogger().debug(
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"In ListSchemas-> ERROR " + e1.getMessage());
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throw e1;
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} catch (InvalidResultException e2) {
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// e2.printStackTrace();
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AnalysisLogger.getLogger().debug(
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"In ListSchemas-> ERROR " + e2.getMessage());
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throw e2;
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} catch (IOException e3) {
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// e3.printStackTrace();
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AnalysisLogger.getLogger().debug(
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"In ListSchemas-> Exception " + e3.getMessage());
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throw e3;
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}
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catch (Exception e4) {
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// e4.printStackTrace();
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AnalysisLogger.getLogger().debug(
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"In ListSchemas-> Exception " + e4.getMessage());
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throw e4;
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} finally {
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// close the connection
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mgt.closeConnection();
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}
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}
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@Override
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protected void setInputParameters() {
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// AnalysisLogger.getLogger().debug("In ListSchemas->setting inputs");
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// resource and database's name specified by the user
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addStringInput("ResourceName", "The name of the resource", "");
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addStringInput("DatabaseName", "The name of the database", "");
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}
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@Override
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public void shutdown() {
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AnalysisLogger.getLogger().debug("In ListSchemas->Shutdown");
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}
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@Override
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public StatisticalType getOutput() {
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AnalysisLogger.getLogger().debug("In ListSchemas->retrieving outputs");
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// generate a primitive type for the collection
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PrimitiveType output = new PrimitiveType(LinkedHashMap.class.getName(),
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map, PrimitiveTypes.MAP, "ResultsMap" + UUID.randomUUID(),
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"Results Map");
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return output;
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}
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// method that retrieves the schema's list
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private List<String> getSchemas() throws Exception {
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List<String> listSchemas = new ArrayList<String>();
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try {
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listSchemas = mgt.getSchemas();
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} catch (Exception e) {
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// e.printStackTrace();
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// System.out.println(e.getMessage());
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throw e;
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}
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// finally {
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// if (sf.isClosed() == false) {
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// mgt.closeConnection();
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// }
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// }
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return listSchemas;
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}
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// method that retrieves information useful for the connection
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private List<String> retrieveInfo() throws Exception,
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IllegalStateException, DiscoveryException, InvalidResultException {
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// the user specifies the resource and the database'name
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resourceName = getInputParameter("ResourceName");
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if (resourceName != null) {
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resourceName = getInputParameter("ResourceName").trim();
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}
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if ((resourceName == null) || (resourceName.equals(""))) {
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throw new Exception("Warning: insert the resource name");
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}
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databaseName = getInputParameter("DatabaseName");
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if (databaseName != null) {
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databaseName = getInputParameter("DatabaseName").trim();
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}
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if ((databaseName == null) || (databaseName.equals(""))) {
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throw new Exception("Warning: insert the database name");
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}
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// retrieve the chosen resource
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DatabasesDiscoverer discovery = new DatabasesDiscoverer();
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// list that contains information useful for the connection
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List<String> info = new ArrayList<String>();
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// try{
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List<DBResource> resources = discovery.discover();
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AnalysisLogger.getLogger().debug(
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"In ListSchemas->number of database resources: "
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+ resources.size());
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for (int i = 0; i < resources.size(); i++) {
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AnalysisLogger.getLogger().debug(
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"In ListSchemas->Resource's name: "
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+ resources.get(i).getResourceName());
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}
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check: for (int i = 0; i < resources.size(); i++) {
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if (resources.get(i).getResourceName().toLowerCase()
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.equals(resourceName.toLowerCase())) {
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normalizeDBInfo(resources.get(i));
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for (int j = 0; j < resources.get(i).getAccessPoints().size(); j++) {
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// if (resources.get(i).getAccessPoints().get(j)
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// .getDatabaseName().equals(databaseName)) {
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//
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// info.add(resources.get(i).getAccessPoints().get(j)
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// .getUsername());
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//
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// info.add(resources.get(i).getAccessPoints().get(j)
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// .getPassword());
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//
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// info.add(resources.get(i).getAccessPoints().get(j)
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// .getDriver());
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//
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// // driverInfo =
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// // resources.get(i).getAccessPoints().get(j)
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// // .getDriver();
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//
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// info.add(resources.get(i).getAccessPoints().get(j)
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// .getDialect());
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//
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// info.add(resources.get(i).getAccessPoints().get(j)
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// .address());
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//
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// info.add(databaseName);
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//
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// break check;
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//
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// }
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// if (resources.get(i).getAccessPoints().get(j)
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// .address().equals(url)){
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//
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// System.out.println("url selezionato");
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//
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//
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//
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// }
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if (resources.get(i).getAccessPoints().get(j)
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.getDatabaseName().toLowerCase()
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.equals(databaseName.toLowerCase())) {
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info.add(resources.get(i).getAccessPoints().get(j)
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.getUsername());
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AnalysisLogger.getLogger().debug(
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"In ListSchemas->username: "
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+ resources.get(i).getAccessPoints()
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.get(j).getUsername());
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info.add(resources.get(i).getAccessPoints().get(j)
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.getPassword());
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AnalysisLogger.getLogger().debug(
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"In ListSchemas->password: "
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+ resources.get(i).getAccessPoints()
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.get(j).getPassword());
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info.add(resources.get(i).getAccessPoints().get(j)
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.getDriver());
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AnalysisLogger.getLogger().debug(
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"In ListSchemas->driver: "
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+ resources.get(i).getAccessPoints()
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.get(j).getDriver());
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// driverInfo =
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// resources.get(i).getAccessPoints().get(j)
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// .getDriver();
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info.add(resources.get(i).getAccessPoints().get(j)
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.getDialect());
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AnalysisLogger.getLogger().debug(
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"In ListSchemas->dialect: "
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+ resources.get(i).getAccessPoints()
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.get(j).getDialect());
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info.add(resources.get(i).getAccessPoints().get(j)
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.address());
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AnalysisLogger.getLogger().debug(
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"In ListSchemas->url: "
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+ resources.get(i).getAccessPoints()
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.get(j).address());
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info.add(databaseName);
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AnalysisLogger.getLogger().debug(
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"In ListSchemas->databasename: "
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+ resources.get(i).getAccessPoints()
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.get(j).getDatabaseName());
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break check;
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}
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}
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}
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}
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AnalysisLogger.getLogger().debug(
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"In ListSchemas->information useful for connection: retrieved");
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// }
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// catch(IllegalStateException e)
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// {
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// // e.printStackTrace();
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// throw e;
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// }
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// catch(DiscoveryException e1)
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// {
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// e1.printStackTrace();
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// throw e1;
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// }
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// catch(InvalidResultException e2)
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// {
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// e2.printStackTrace();
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// throw e2;
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// }
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return info;
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}
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// method that allows to create the connection
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private void getConnection(List<String> Info) throws IOException {
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// create the connection
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Iterator<String> iterator = Info.iterator();
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String DatabaseUserName = iterator.next();
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String DatabasePassword = iterator.next();
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String DatabaseDriver = iterator.next();
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String DatabaseDialect = iterator.next();
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String DatabaseURL = iterator.next();
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String DatabaseName = iterator.next();
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mgt.createConnection(DatabaseUserName,
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DatabasePassword, DatabaseDriver, DatabaseDialect, DatabaseURL,
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DatabaseName);
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// if (sf.isClosed()){
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// AnalysisLogger.getLogger().debug("In ListSchemas->database "+DatabaseName+": connected");
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// }
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}
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private void normalizeDBInfo(DBResource resource) throws Exception {
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try{
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int ap = resource.getAccessPoints().size();
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for (int i = 0; i < ap; i++) {
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resource.normalize(i);
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}
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}catch (Exception e) {
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AnalysisLogger.getLogger().debug(
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"In ListSchemas->: Error in normalization process"
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+ e.getMessage());
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throw e;
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}
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// int ap = resource.getAccessPoints().size();
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//
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// for (int i = 0; i < ap; i++) {
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//
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//// try {
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// resource.normalize(i);
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//// } catch (IOException e) {
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//
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// // e.printStackTrace();
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//// AnalysisLogger.getLogger().debug(
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//// "In ListTables->: Error in normalization process"
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//// + e.getMessage());
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//
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//// throw e;
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//
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//// }
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//
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// }
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}
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}
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