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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.clustercontroller.core.restapiv2.requests;
import com.yahoo.log.LogLevel;
import com.yahoo.vdslib.state.ClusterState;
import com.yahoo.vdslib.state.Node;
import com.yahoo.vdslib.state.NodeState;
import com.yahoo.vdslib.state.State;
import com.yahoo.vespa.clustercontroller.core.NodeInfo;
import com.yahoo.vespa.clustercontroller.core.NodeStateChangeChecker;
import com.yahoo.vespa.clustercontroller.core.RemoteClusterControllerTask;
import com.yahoo.vespa.clustercontroller.core.ContentCluster;
import com.yahoo.vespa.clustercontroller.core.listeners.NodeStateOrHostInfoChangeHandler;
import com.yahoo.vespa.clustercontroller.core.restapiv2.Id;
import com.yahoo.vespa.clustercontroller.core.restapiv2.MissingIdException;
import com.yahoo.vespa.clustercontroller.core.restapiv2.Request;
import com.yahoo.vespa.clustercontroller.utils.staterestapi.errors.*;
import com.yahoo.vespa.clustercontroller.utils.staterestapi.requests.SetUnitStateRequest;
import com.yahoo.vespa.clustercontroller.utils.staterestapi.response.SetResponse;
import com.yahoo.vespa.clustercontroller.utils.staterestapi.response.UnitState;
import java.util.Map;
import java.util.logging.Logger;
public class SetNodeStateRequest extends Request<SetResponse> {
private static final Logger log = Logger.getLogger(SetNodeStateRequest.class.getName());
private final Id.Node id;
private final Map<String, UnitState> newStates;
private final SetUnitStateRequest.Condition condition;
private final SetUnitStateRequest.ResponseWait responseWait;
public SetNodeStateRequest(Id.Node id, SetUnitStateRequest setUnitStateRequest) {
super(MasterState.MUST_BE_MASTER);
this.id = id;
this.newStates = setUnitStateRequest.getNewState();
this.condition = setUnitStateRequest.getCondition();
this.responseWait = setUnitStateRequest.getResponseWait();
}
@Override
public SetResponse calculateResult(RemoteClusterControllerTask.Context context) throws StateRestApiException {
SetResponse setResponse = setWantedState(
context.cluster,
condition,
newStates,
id.getNode(),
context.nodeStateOrHostInfoChangeHandler,
context.currentState);
return setResponse;
}
static NodeState getRequestedNodeState(Map<String, UnitState> newStates, Node n) throws StateRestApiException {
UnitState newState = newStates.get("user");
if (newState == null) throw new InvalidContentException("No new user state given in request");
State state;
switch (newState.getId().toLowerCase()) {
case "up": state = State.UP; break;
case "retired": state = State.RETIRED; break;
case "maintenance": state = State.MAINTENANCE; break;
case "down": state = State.DOWN; break;
default: throw new InvalidContentException("Invalid user state '" + newState.getId() + "' given.");
}
return new NodeState(n.getType(), state).setDescription(newState.getReason());
}
@Override
public boolean hasVersionAckDependency() {
return (responseWait == SetUnitStateRequest.ResponseWait.WAIT_UNTIL_CLUSTER_ACKED);
}
static SetResponse setWantedState(
ContentCluster cluster,
SetUnitStateRequest.Condition condition,
Map<String, UnitState> newStates,
Node node,
NodeStateOrHostInfoChangeHandler stateListener,
ClusterState currentClusterState) throws StateRestApiException {
if ( ! cluster.getConfiguredNodes().containsKey(node.getIndex())) {
throw new MissingIdException(cluster.getName(), node);
}
NodeInfo nodeInfo = cluster.getNodeInfo(node);
if (nodeInfo == null)
throw new IllegalArgumentException("Cannot set the wanted state of unknown node " + node);
NodeState wantedState = nodeInfo.getUserWantedState();
NodeState newWantedState = getRequestedNodeState(newStates, node);
NodeStateChangeChecker.Result result = cluster.calculateEffectOfNewState(
node, currentClusterState, condition, wantedState, newWantedState);
log.log(LogLevel.DEBUG, "node=" + node +
" current-cluster-state=" + currentClusterState + // Includes version in output format
" condition=" + condition +
" wanted-state=" + wantedState +
" new-wanted-state=" + newWantedState +
" change-check=" + result);
if (result.settingWantedStateIsAllowed()) {
nodeInfo.setWantedState(newWantedState);
stateListener.handleNewWantedNodeState(nodeInfo, newWantedState);
}
// wasModified is true if the new/current State equals the wanted state in the request.
boolean wasModified = result.settingWantedStateIsAllowed() || result.wantedStateAlreadySet();
// If the state was successfully set, just return an "ok" message back.
String reason = wasModified ? "ok" : result.getReason();
return new SetResponse(reason, wasModified);
}
}
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