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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.vespa.clustercontroller.utils.staterestapi;
import com.yahoo.vespa.clustercontroller.utils.staterestapi.errors.InvalidContentException;
import com.yahoo.vespa.clustercontroller.utils.staterestapi.errors.MissingUnitException;
import com.yahoo.vespa.clustercontroller.utils.staterestapi.errors.OperationNotSupportedForUnitException;
import com.yahoo.vespa.clustercontroller.utils.staterestapi.errors.StateRestApiException;
import com.yahoo.vespa.clustercontroller.utils.staterestapi.requests.SetUnitStateRequest;
import com.yahoo.vespa.clustercontroller.utils.staterestapi.requests.UnitStateRequest;
import com.yahoo.vespa.clustercontroller.utils.staterestapi.response.*;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
public class DummyStateApi implements StateRestAPI {
private final DummyBackend backend;
private Exception induceException;
public DummyStateApi(DummyBackend backend) {
this.backend = backend;
}
public void induceException(StateRestApiException e) {
induceException = e;
}
public void induceException(RuntimeException e) {
induceException = e;
}
public class SubUnitListImpl implements SubUnitList {
private final Map<String, String> links = new LinkedHashMap<>();
private final Map<String, UnitResponse> values = new LinkedHashMap<>();
@Override
public Map<String, String> getSubUnitLinks() { return links; }
@Override
public Map<String, UnitResponse> getSubUnits() { return values; }
public void addUnit(DummyBackend.Cluster cluster, int recursive) {
if (recursive == 0) {
links.put(cluster.id, cluster.id);
} else {
values.put(cluster.id, getClusterState(cluster, recursive - 1));
}
}
public void addUnit(DummyBackend.Node node, int recursive) {
if (recursive == 0) {
String link = node.clusterId + '/' + node.id;
links.put(node.id, link);
} else {
values.put(node.id, getNodeState(node));
}
}
}
private UnitResponse getClusterList(final int recursive) {
return new UnitResponse() {
@Override
public UnitAttributes getAttributes() { return null; }
@Override
public CurrentUnitState getCurrentState() { return null; }
@Override
public UnitMetrics getMetrics() { return null; }
@Override
public Map<String, SubUnitList> getSubUnits() {
Map<String, SubUnitList> result = new LinkedHashMap<>();
SubUnitListImpl subUnits = new SubUnitListImpl();
result.put("cluster", subUnits);
for (Map.Entry<String, DummyBackend.Cluster> e : backend.getClusters().entrySet()) {
subUnits.addUnit(e.getValue(), recursive);
}
return result;
}
@Override
public DistributionStates getDistributionStates() {
return null;
}
};
}
private UnitResponse getClusterState(final DummyBackend.Cluster cluster, final int recursive) {
return new UnitResponse() {
@Override
public UnitAttributes getAttributes() { return null; }
@Override
public CurrentUnitState getCurrentState() { return null; }
@Override
public UnitMetrics getMetrics() { return null; }
@Override
public Map<String, SubUnitList> getSubUnits() {
Map<String, SubUnitList> result = new LinkedHashMap<>();
SubUnitListImpl subUnits = new SubUnitListImpl();
result.put("node", subUnits);
for (Map.Entry<String, DummyBackend.Node> e : cluster.nodes.entrySet()) {
subUnits.addUnit(e.getValue(), recursive);
}
return result;
}
@Override
public DistributionStates getDistributionStates() {
return null;
}
};
}
private UnitResponse getNodeState(final DummyBackend.Node node) {
return new UnitResponse() {
@Override
public UnitAttributes getAttributes() {
return new UnitAttributes() {
@Override
public Map<String, String> getAttributeValues() {
Map<String, String> attrs = new LinkedHashMap<>();
attrs.put("group", node.group);
return attrs;
}
};
}
@Override
public Map<String, SubUnitList> getSubUnits() { return null; }
@Override
public CurrentUnitState getCurrentState() {
return new CurrentUnitState() {
@Override
public Map<String, UnitState> getStatePerType() {
Map<String, UnitState> m = new LinkedHashMap<>();
m.put("current", new UnitState() {
@Override
public String id() { return node.state; }
@Override
public String reason() { return node.reason; }
@Override
public String toString() { return id() +": " + reason(); }
});
return m;
}
};
}
@Override
public UnitMetrics getMetrics() {
return new UnitMetrics() {
@Override
public Map<String, Long> getMetricMap() {
Map<String, Long> m = new LinkedHashMap<>();
m.put("doc-count", (long) node.docCount);
return m;
}
};
}
@Override
public DistributionStates getDistributionStates() {
return null;
}
};
}
@Override
public UnitResponse getState(UnitStateRequest request) throws StateRestApiException {
checkForInducedException();
List<String> path = request.getUnitPath();
if (path.size() == 0) {
return getClusterList(request.getRecursiveLevels());
}
DummyBackend.Cluster c = backend.getClusters().get(path.get(0));
if (c == null) throw new MissingUnitException(path, 0);
if (path.size() == 1) {
return getClusterState(c, request.getRecursiveLevels());
}
DummyBackend.Node n = c.nodes.get(path.get(1));
if (n == null) throw new MissingUnitException(path, 1);
if (path.size() == 2) {
return getNodeState(n);
}
throw new MissingUnitException(path, 3);
}
@Override
public SetResponse setUnitState(SetUnitStateRequest request) throws StateRestApiException {
checkForInducedException();
List<String> path = request.getUnitPath();
if (path.size() != 2) {
throw new OperationNotSupportedForUnitException(
path, "You can only set states on nodes");
}
DummyBackend.Node n = null;
DummyBackend.Cluster c = backend.getClusters().get(path.get(0));
if (c != null) {
n = c.nodes.get(path.get(1));
}
if (n == null) throw new MissingUnitException(path, 2);
Map<String, UnitState> newState = request.getNewState();
if (newState.size() != 1 || !newState.containsKey("current")) {
throw new InvalidContentException("Only state of type 'current' is allowed to be set.");
}
n.state = newState.get("current").id();
n.reason = newState.get("current").reason();
String reason = String.format("DummyStateAPI %s call", request.getResponseWait().getName());
return new SetResponse(reason, true);
}
private void checkForInducedException() throws StateRestApiException {
if (induceException == null) return;
Exception e = induceException;
induceException = null;
if (e instanceof RuntimeException) {
throw (RuntimeException) e;
}
throw (StateRestApiException) e;
}
}
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