/*******************************************************************************
* Copyright (c) 2012-2017 Codenvy, S.A.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Codenvy, S.A. - initial API and implementation
*******************************************************************************/
package org.eclipse.che.api.agent.server;
import org.eclipse.che.api.core.ApiException;
import org.eclipse.che.api.core.ServerException;
import org.eclipse.che.api.core.model.machine.Machine;
import org.eclipse.che.api.core.model.machine.Server;
import org.eclipse.che.api.core.rest.HttpJsonRequest;
import org.eclipse.che.api.core.rest.HttpJsonResponse;
import org.eclipse.che.api.workspace.shared.dto.WsAgentHealthStateDto;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.inject.Inject;
import javax.inject.Singleton;
import java.io.IOException;
import java.util.Map;
import static javax.ws.rs.core.Response.Status.NOT_FOUND;
import static javax.ws.rs.core.Response.Status.SERVICE_UNAVAILABLE;
import static org.eclipse.che.api.machine.shared.Constants.WSAGENT_REFERENCE;
import static org.eclipse.che.dto.server.DtoFactory.newDto;
/**
* Mechanism for checking workspace agent's state.
*
* @author Vitalii Parfonov
* @author Valeriy Svydenko
*/
@Singleton
public class WsAgentHealthCheckerImpl implements WsAgentHealthChecker {
protected static final Logger LOG = LoggerFactory.getLogger(WsAgentHealthCheckerImpl.class);
private final WsAgentPingRequestFactory wsAgentPingRequestFactory;
@Inject
public WsAgentHealthCheckerImpl(WsAgentPingRequestFactory wsAgentPingRequestFactory) {
this.wsAgentPingRequestFactory = wsAgentPingRequestFactory;
}
@Override
public WsAgentHealthStateDto check(Machine machine) throws ServerException {
Server wsAgent = getWsAgent(machine);
final WsAgentHealthStateDto agentHealthStateDto = newDto(WsAgentHealthStateDto.class);
if (wsAgent == null) {
return agentHealthStateDto.withCode(NOT_FOUND.getStatusCode())
.withReason("Workspace Agent not available");
}
try {
final HttpJsonRequest pingRequest = createPingRequest(machine);
final HttpJsonResponse response = pingRequest.request();
return agentHealthStateDto.withCode(response.getResponseCode());
} catch (ApiException | IOException e) {
return agentHealthStateDto.withCode(SERVICE_UNAVAILABLE.getStatusCode())
.withReason(e.getMessage());
}
}
protected HttpJsonRequest createPingRequest(Machine machine) throws ServerException {
return wsAgentPingRequestFactory.createRequest(machine);
}
private Server getWsAgent(Machine machine) {
final Map<String, ? extends Server> servers = machine.getRuntime().getServers();
for (Server server : servers.values()) {
if (WSAGENT_REFERENCE.equals(server.getRef())) {
return server;
}
}
return null;
}
}