Examples of org.exist.storage.BrokerPool

org.exist.storage.BrokerPool
This class controls all available instances of the database. Use it to configure, start and stop database instances. You may have multiple instances defined, each using its own configuration. To define multiple instances, pass an identification string to {@link #configure(String,int,int,Configuration)}and use {@link #getInstance(String)} to retrieve an instance. @author Wolfgang Meier @author Pierrick Brihaye

        }
    }


    private static void removeTestCollections() throws Exception {


        BrokerPool pool = BrokerPool.getInstance();
        DBBroker broker = null;
        TransactionManager transact = null;
        Txn txn = null;
        try {
            Subject admin = pool.getSecurityManager().authenticate(ADMIN_UID, ADMIN_PWD);


            broker = pool.get(admin);


            transact = pool.getTransactionManager();
            txn = transact.beginTransaction();


            /** create nessecary collections if they dont exist */
            Collection testCollection = broker.getOrCreateCollection(txn, XmldbURI.create(VALIDATION_HOME_COLLECTION_URI));
            broker.removeCollection(txn, testCollection);


            transact.commit(txn);


        } catch (Exception e) {
            if(transact != null && txn != null) {
                transact.abort(txn);
            }
            throw e;
        } finally {
            if(broker != null) {
                pool.release(broker);
            }
        }
    }

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        BrokerPool.stopAll(true);
    }


    private static void createTestCollections() throws Exception {


        BrokerPool pool = BrokerPool.getInstance();
        DBBroker broker = null;
        TransactionManager transact = null;
        Txn txn = null;
        try {
            Subject admin = pool.getSecurityManager().authenticate(ADMIN_UID, ADMIN_PWD);


            broker = pool.get(admin);


            transact = pool.getTransactionManager();
            txn = transact.beginTransaction();




            /** create nessecary collections if they dont exist */
            Collection testCollection = broker.getOrCreateCollection(txn, XmldbURI.create(VALIDATION_HOME_COLLECTION_URI));
            testCollection.getPermissions().setOwner(GUEST_UID);
            broker.saveCollection(txn, testCollection);


            Collection col = broker.getOrCreateCollection(txn, XmldbURI.create(VALIDATION_HOME_COLLECTION_URI + "/" + TestTools.VALIDATION_TMP_COLLECTION));
            col.getPermissions().setOwner(GUEST_UID);
            broker.saveCollection(txn, col);


            transact.commit(txn);


        } catch (Exception e) {
            if(transact != null && txn != null) {
                transact.abort(txn);
            }
            throw e;
        } finally {
            if(broker != null) {
                pool.release(broker);
            }
        }
    }

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        }
    }


    private static void removeTestCollections() throws Exception {


        BrokerPool pool = BrokerPool.getInstance();
        DBBroker broker = null;
        TransactionManager transact = null;
        Txn txn = null;
        try {
            Subject admin = pool.getSecurityManager().authenticate(ADMIN_UID, ADMIN_PWD);


            broker = pool.get(admin);


            transact = pool.getTransactionManager();
            txn = transact.beginTransaction();


            Collection testCollection = broker.getOrCreateCollection(txn, XmldbURI.create(VALIDATION_HOME_COLLECTION_URI));
            broker.removeCollection(txn, testCollection);


            transact.commit(txn);


        } catch (Exception e) {
            if(transact != null && txn != null) {
                transact.abort(txn);
            }
            throw e;
        } finally {
            if(broker != null) {
                pool.release(broker);
            }
        }
    }

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    public XSL() {
  }
    
    protected static XSLStylesheet compile(ElementAtExist source) throws XPathException {
      BrokerPool pool = null;
      DBBroker broker = null;
      try {
          pool = BrokerPool.getInstance();
        broker = pool.get(null);
      return compile(source, broker);
    } catch (EXistException e) {
      throw new XPathException(e);
    } finally {
      if (pool != null) pool.release(broker);
    }
    }

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                pool.release(broker);
        }
    }


    protected void tearDown() {
        BrokerPool pool = null;
        DBBroker broker = null;
        TransactionManager transact = null;
        Txn transaction = null;
        try {
            pool = BrokerPool.getInstance();
            assertNotNull(pool);
            broker = pool.get(pool.getSecurityManager().getSystemSubject());
            assertNotNull(broker);
            transact = pool.getTransactionManager();
            assertNotNull(transact);
            transaction = transact.beginTransaction();
            assertNotNull(transaction);
            System.out.println("Transaction started ...");


            Collection root = broker.getOrCreateCollection(transaction, TestConstants.TEST_COLLECTION_URI);
            assertNotNull(root);
            broker.removeCollection(transaction, root);


            Collection config = broker.getOrCreateCollection(transaction,
                XmldbURI.create(CollectionConfigurationManager.CONFIG_COLLECTION + "/db"));
            assertNotNull(config);
            broker.removeCollection(transaction, config);
            
            transact.commit(transaction);
        } catch (Exception e) {
          transact.abort(transaction);
            e.printStackTrace();
            fail(e.getMessage());
        } finally {
            if (pool != null) pool.release(broker);
        }
        BrokerPool.stopAll(false);
    }

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            return true;
        }
        xqueryResourcePath = xqueryResourcePath.trim();
        LOG.info("org.exist.security.openid.verify_logging_script = \"" + xqueryResourcePath + "\"");
        
        BrokerPool pool = null;
        DBBroker broker = null;


        try {
            DocumentImpl resource = null;
            Source source = null;


            pool = BrokerPool.getInstance();


            broker = pool.get(principal);
            if (broker == null) {
                LOG.error("Unable to retrieve DBBroker for " + principal.getMetadataValue(AXSchemaType.ALIAS_USERNAME));
                return false;
            }


            XmldbURI pathUri = XmldbURI.create(xqueryResourcePath);




            resource = broker.getXMLResource(pathUri, Lock.READ_LOCK);


            if(resource != null) {
                LOG.info("Resource " + xqueryResourcePath + " exists.");
                source = new DBSource(broker, (BinaryDocument)resource, true);
            } else {
                LOG.info("Resource " + xqueryResourcePath + " does not exist.");
                LOG.info("pathURI " + pathUri );
                return true;
            }




            XQuery xquery = broker.getXQueryService();


            if (xquery == null) {
                LOG.error("broker unable to retrieve XQueryService");
                return false;
            }


            XQueryContext context = xquery.newContext(AccessContext.REST);


            CompiledXQuery compiled = xquery.compile(context, source);


            Properties outputProperties = new Properties();


            Sequence result = xquery.execute(compiled, null, outputProperties);
            LOG.info("XQuery execution results: " + result.toString());


        } catch (Exception e) {
            LOG.error("Exception while executing OpenID registration script for " + principal.getMetadataValue(AXSchemaType.ALIAS_USERNAME), e);
            return false;
        }
        finally {
            if (pool != null)
                pool.release(broker);
        }
        return true;
    }

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      throw new TransformerException("The source type "+xmlSource.getClass()+" do not supported.");
    }
  }


  private void transformStream(StAXSource source, StAXResult out) throws TransformerException {
    BrokerPool db = null;
    DBBroker broker = null;
    try {
      db = BrokerPool.getInstance();
      broker = db.get(null);
      
      StAXSequenceIterator sequenceIterator = new StAXSequenceIterator(source);
      
      XSLContext context = new XSLContext(db);
      context.setOutput(out);


      context.getResultWriter().writeStartDocument("UTF-8", "1.0");
      
      if (compiled.rootTemplate != null)
        compiled.rootTemplate.process(context, sequenceIterator);
      else
        ApplyTemplates.searchAndProcess(sequenceIterator, context);
      
      context.getResultWriter().writeEndDocument();
      
    } catch (EXistException e) {
      e.printStackTrace();
    } catch (XMLStreamException e) {
      e.printStackTrace();
    } finally {
      if (db != null)
        db.release(broker);
    }


//    try {
//      for (int event = staxXmlReader.next(); event != XMLStreamConstants.END_DOCUMENT; event = staxXmlReader.next()) {
//        switch (event) {

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        XMLUnit.setXpathNamespaceContext(ctx);
    }


    @AfterClass
    public static void closeDB() {
        BrokerPool pool = null;
        DBBroker broker = null;
        TransactionManager transact = null;
        Txn transaction = null;
        try {
            pool = BrokerPool.getInstance();
            assertNotNull(pool);
            broker = pool.get(pool.getSecurityManager().getSystemSubject());
            assertNotNull(broker);
            transact = pool.getTransactionManager();
            assertNotNull(transact);
            transaction = transact.beginTransaction();
            assertNotNull(transaction);
            System.out.println("Transaction started ...");


            Collection root = broker.getOrCreateCollection(transaction, TestConstants.TEST_COLLECTION_URI);
            assertNotNull(root);
            broker.removeCollection(transaction, root);


            Collection config = broker.getOrCreateCollection(transaction,
                XmldbURI.create(CollectionConfigurationManager.CONFIG_COLLECTION + "/db"));
            assertNotNull(config);
            broker.removeCollection(transaction, config);


            transact.commit(transaction);
        } catch (Exception e) {
          transact.abort(transaction);
            e.printStackTrace();
            fail(e.getMessage());
        } finally {
            if (pool != null) pool.release(broker);
        }
        BrokerPool.stopAll(false);
    }

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    this.uri = XmldbURI.create(uri);
  }


  private URLConnection getConnection() throws IOException {
      if (connection == null) {
      BrokerPool database = null;
      DBBroker broker = null;
      try {
        database = BrokerPool.getInstance();
        broker = database.get(null);
        Subject subject = broker.getSubject();
        
        URL url = new URL("xmldb:exist://jsessionid:"+subject.getSessionId()+"@"+ uri.toString());
        connection = url.openConnection();
      } catch (IllegalArgumentException e) {
        throw new IOException(e); 
      } catch (MalformedURLException e) {
        throw new IOException(e); 
      } catch (EXistException e) {
        throw new IOException(e); 
      } finally {
        if (database != null)
          database.release(broker);
      }
      }
      return connection;
  }

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                pool.release(broker);
        }
    }
    
    public void testScanIndex() {
        BrokerPool pool = null;
        DBBroker broker = null;
        try {
            pool = BrokerPool.getInstance();
            broker = pool.get(pool.getSecurityManager().getSystemSubject());
            XQuery xquery = broker.getXQueryService();
            assertNotNull(xquery);
            Sequence seq = xquery.execute(
                "declare namespace gml = 'http://www.opengis.net/gml'; " +
                "declare function local:key-callback($term as xs:string, $data as xs:int+) as element() { " +
                "   <entry>" +
                "     <term>{$term}</term>" +
                "     <frequency>{$data[1]}</frequency>" +
                "     <documents>{$data[2]}</documents>" +
                "     <position>{$data[3]}</position>" +
                "   </entry> " +
                "}; " +
                //"util:index-keys(//gml:*, '', util:function(xs:QName('local:key-callback'), 2), 1000, 'spatial-index')[entry/frequency > 1] ",
                "util:index-keys(//gml:*, '', util:function(xs:QName('local:key-callback'), 2), 1000, 'spatial-index') ",
                null, AccessContext.TEST);
            assertNotNull(seq);
            assertTrue(seq.getItemCount() > 1);
        } catch (Exception e) {
            e.printStackTrace();
            fail(e.getMessage());
        } finally {
            if (pool!=null) pool.release(broker);
        }
    }

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