/**
* Copyright 2010 CosmoCode GmbH
*
* Licensed 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 de.cosmocode.palava.ipc.session;
import java.util.List;
import java.util.Map;
import com.google.common.collect.Maps;
import com.google.inject.Singleton;
import de.cosmocode.palava.ipc.IpcArguments;
import de.cosmocode.palava.ipc.IpcCall;
import de.cosmocode.palava.ipc.IpcCommand;
import de.cosmocode.palava.ipc.IpcCommandExecutionException;
import de.cosmocode.palava.ipc.IpcSession;
/**
* See below.
*
* @since 1.3
* @author Willi Schoenborn
*/
@IpcCommand.Description("Retrieves the values for the specified keys.")
@IpcCommand.Params({
@IpcCommand.Param(name = Naming.KEYS, description = "The requested keys", type = "array"),
@IpcCommand.Param(name = Naming.NAMESPACE, description = "The global namespace keys (null disables)",
type = "string", optional = true)
})
@IpcCommand.Return(name = Naming.ENTRIES, description = "The a mapping of all found entries")
@Singleton
final class Get implements IpcCommand {
@Override
public void execute(IpcCall call, Map<String, Object> result) throws IpcCommandExecutionException {
final IpcArguments arguments = call.getArguments();
final List<Object> keys = arguments.getList(Naming.KEYS);
final String namespace = arguments.getString(Naming.NAMESPACE, null);
final IpcSession session = call.getConnection().getSession();
final Map<Object, Object> entries = Maps.newHashMap();
for (Object key : keys) {
final Object value;
if (namespace == null) {
value = session.get(key);
} else if (session.containsKey(namespace)) {
@SuppressWarnings("unchecked")
final Map<Object, Object> namespaced = (Map<Object, Object>) session.get(namespace);
value = namespaced.get(key);
} else {
value = null;
}
entries.put(key, value);
}
result.put(Naming.ENTRIES, entries);
}
}