/**
* Licensed to Odiago, Inc. under one or more contributor license
* agreements. See the NOTICE.txt file distributed with this work for
* additional information regarding copyright ownership. Odiago, Inc.
* 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 com.odiago.flumebase.exec;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.odiago.flumebase.plan.FlowSpecification;
import com.odiago.flumebase.server.SessionId;
/**
* Execution engine that logs an error for every operation. This execution engine
* is used when the client is not connected to any other execution engine.
*/
public class DummyExecEnv extends ExecEnvironment {
private static final Logger LOG = LoggerFactory.getLogger(
DummyExecEnv.class.getName());
@Override
public SessionId connect() {
// Do nothing.
return new SessionId(0);
}
@Override
public boolean isConnected() {
return false; // Never connected.
}
@Override
public String getEnvName() {
return "dummy";
}
@Override
public QuerySubmitResponse submitQuery(String query, Map<String, String> options) {
return new QuerySubmitResponse("Not connected", null);
}
@Override
public FlowId addFlow(FlowSpecification spec) {
LOG.error("Not connected");
return null;
}
@Override
public void cancelFlow(FlowId id) {
LOG.error("Not connected");
}
@Override
public Map<FlowId, FlowInfo> listFlows() {
LOG.error("Not connected");
return new HashMap<FlowId, FlowInfo>();
}
@Override
public void joinFlow(FlowId id) {
LOG.error("Not connected");
}
@Override
public boolean joinFlow(FlowId id, long timeout) {
LOG.error("Not connected");
return false;
}
@Override
public void watchFlow(SessionId sessionId, FlowId flowId) {
LOG.error("Not connected");
}
@Override
public void unwatchFlow(SessionId sessionId, FlowId flowId) {
LOG.error("Not connected");
}
@Override
public List<FlowId> listWatchedFlows(SessionId sessionId) {
return Collections.emptyList();
}
@Override
public void setFlowName(FlowId flowId, String name) {
LOG.error("Not connected");
}
@Override
public void disconnect(SessionId sessionId) {
// Do nothing.
}
@Override
public void shutdown() {
LOG.error("Cannot shut down: Not connected.");
}
}