/**
* Copyright 2010 Google Inc.
*
* 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 org.waveprotocol.box.server.robots.operations;
import com.google.common.collect.Maps;
import com.google.inject.Inject;
import com.google.wave.api.InvalidRequestException;
import com.google.wave.api.OperationRequest;
import com.google.wave.api.JsonRpcConstant.ParamsProperty;
import com.google.wave.api.robot.CapabilityFetchException;
import com.google.wave.api.robot.RobotName;
import org.waveprotocol.box.server.account.AccountData;
import org.waveprotocol.box.server.account.RobotAccountData;
import org.waveprotocol.box.server.persistence.AccountStore;
import org.waveprotocol.box.server.persistence.PersistenceException;
import org.waveprotocol.box.server.robots.OperationContext;
import org.waveprotocol.box.server.robots.RobotCapabilities;
import org.waveprotocol.box.server.robots.passive.RobotConnector;
import org.waveprotocol.box.server.robots.util.OperationUtil;
import org.waveprotocol.wave.model.wave.ParticipantId;
import org.waveprotocol.wave.util.logging.Log;
/**
* Implementation of the robot.notify operation which might update the robot's
* capabilties.
*
* @author ljvderijk@gmail.com (Lennard de Rijk)
*/
public class NotifyOperationService implements OperationService {
private static final Log LOG = Log.get(NotifyOperationService.class);
private final AccountStore accountStore;
private final RobotConnector connector;
@Inject
public NotifyOperationService(AccountStore accountStore, RobotConnector connector) {
this.accountStore = accountStore;
this.connector = connector;
}
@Override
public void execute(OperationRequest operation, OperationContext context,
ParticipantId participant) throws InvalidRequestException {
String capabilitiesHash =
OperationUtil.getRequiredParameter(operation, ParamsProperty.CAPABILITIES_HASH);
RobotName robotName = RobotName.fromAddress(participant.getAddress());
ParticipantId robotAccountId = ParticipantId.ofUnsafe(robotName.toEmailAddress());
AccountData account;
try {
account = accountStore.getAccount(robotAccountId);
} catch (PersistenceException e) {
LOG.severe("Failed to retreive account data for " + robotAccountId, e);
context.constructErrorResponse(operation, "Unable to retrieve account data");
return;
}
if (account == null || !account.isRobot()) {
throw new InvalidRequestException("Can't exectute robot.notify for unknown robot "
+ robotAccountId);
}
RobotAccountData robotAccountData = account.asRobot();
RobotCapabilities capabilities = robotAccountData.getCapabilities();
if (capabilities != null && capabilitiesHash.equals(capabilities.getCapabilitiesHash())) {
// No change in capabilities indicated
context.constructResponse(operation, Maps.<ParamsProperty, Object> newHashMap());
return;
}
try {
robotAccountData = connector.fetchCapabilities(robotAccountData, "");
} catch (CapabilityFetchException e) {
LOG.fine("Unable to retrieve capabilities for " + account.getId(), e);
context.constructErrorResponse(operation, "Unable to retrieve new capabilities");
return;
}
try {
accountStore.putAccount(robotAccountData);
} catch (PersistenceException e) {
LOG.severe("Failed to update account data for " + robotAccountId, e);
context.constructErrorResponse(operation, "Unable to update account data");
return;
}
// Set empty response to indicate success
context.constructResponse(operation, Maps.<ParamsProperty, Object> newHashMap());
}
}