/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 org.apache.marmotta.platform.backend.http;
import org.apache.marmotta.platform.core.api.config.ConfigurationService;
import org.apache.marmotta.platform.core.api.triplestore.StoreProvider;
import org.openrdf.repository.http.HTTPRepository;
import org.openrdf.repository.sail.SailRepository;
import org.openrdf.sail.NotifyingSail;
import org.openrdf.sail.Sail;
import org.openrdf.sail.federation.Federation;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.enterprise.context.ApplicationScoped;
import javax.inject.Inject;
/**
* A triple store provider for Sesame HTTP repositories.
*
* @author Sebastian Schaffert (sschaffert@apache.org)
*/
@ApplicationScoped
public class HTTPStoreProvider implements StoreProvider {
private static Logger log = LoggerFactory.getLogger(HTTPStoreProvider.class);
@Inject
private ConfigurationService configurationService;
private HTTPRepository httpRepository;
/**
* Create the repository using the sail given as argument. This method is needed because some backends
* use custom implementations of SailRepository.
*
* @param sail
* @return
*/
@Override
public SailRepository createRepository(Sail sail) {
return new SailRepository(sail);
}
/**
* Create the store provided by this SailProvider
*
* @return a new instance of the store
*/
@Override
public NotifyingSail createStore() {
String serverUrl = configurationService.getStringConfiguration("backend.http.url");
if(serverUrl == null) {
throw new IllegalStateException("no server URL defined for HTTP backend (property backend.http.url)");
}
log.info("creating new HTTP repository client for server at {}", serverUrl);
httpRepository = new HTTPRepository(serverUrl);
// TODO: would be better to implement a RepositorySail as NotifyingSail wrapper around a repository
Federation store = new Federation();
store.addMember(httpRepository);
return (NotifyingSail)store;
}
/**
* Return the name of the provider. Used e.g. for displaying status information or logging.
*
* @return
*/
@Override
public String getName() {
return "Memory Store";
}
/**
* Return true if this sail provider is enabled in the configuration.
*
* @return
*/
@Override
public boolean isEnabled() {
return true;
}
}