org.elasticsearch.rest.action.admin.cluster.RestClusterGetSettingsAction Maven / Gradle / Ivy
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Elasticsearch subproject :server
/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
package org.elasticsearch.rest.action.admin.cluster;
import org.elasticsearch.Version;
import org.elasticsearch.action.admin.cluster.settings.ClusterGetSettingsAction;
import org.elasticsearch.action.admin.cluster.settings.RestClusterGetSettingsResponse;
import org.elasticsearch.action.admin.cluster.state.ClusterStateRequest;
import org.elasticsearch.action.support.master.MasterNodeReadRequest;
import org.elasticsearch.client.internal.Requests;
import org.elasticsearch.client.internal.node.NodeClient;
import org.elasticsearch.cluster.node.DiscoveryNodes;
import org.elasticsearch.common.settings.ClusterSettings;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.settings.SettingsFilter;
import org.elasticsearch.rest.BaseRestHandler;
import org.elasticsearch.rest.RestRequest;
import org.elasticsearch.rest.action.RestToXContentListener;
import java.io.IOException;
import java.util.List;
import java.util.Set;
import java.util.function.Supplier;
import static org.elasticsearch.rest.RestRequest.Method.GET;
public class RestClusterGetSettingsAction extends BaseRestHandler {
private final Settings settings;
private final ClusterSettings clusterSettings;
private final SettingsFilter settingsFilter;
private final Supplier nodesInCluster;
public RestClusterGetSettingsAction(
Settings settings,
ClusterSettings clusterSettings,
SettingsFilter settingsFilter,
Supplier nodesInCluster
) {
this.settings = settings;
this.clusterSettings = clusterSettings;
this.settingsFilter = settingsFilter;
this.nodesInCluster = nodesInCluster;
}
@Override
public List routes() {
return List.of(new Route(GET, "/_cluster/settings"));
}
@Override
public String getName() {
return "cluster_get_settings_action";
}
private void setUpRequestParams(MasterNodeReadRequest clusterRequest, RestRequest request) {
clusterRequest.local(request.paramAsBoolean("local", clusterRequest.local()));
clusterRequest.masterNodeTimeout(request.paramAsTime("master_timeout", clusterRequest.masterNodeTimeout()));
}
@Override
public RestChannelConsumer prepareRequest(final RestRequest request, final NodeClient client) throws IOException {
final boolean renderDefaults = request.paramAsBoolean("include_defaults", false);
if (nodesInCluster.get().getMinNodeVersion().before(Version.V_8_3_0)) {
return prepareLegacyRequest(request, client, renderDefaults);
}
ClusterGetSettingsAction.Request clusterSettingsRequest = new ClusterGetSettingsAction.Request();
setUpRequestParams(clusterSettingsRequest, request);
return channel -> client.execute(
ClusterGetSettingsAction.INSTANCE,
clusterSettingsRequest,
new RestToXContentListener(channel).map(
r -> response(r, renderDefaults, settingsFilter, clusterSettings, settings)
)
);
}
private RestChannelConsumer prepareLegacyRequest(final RestRequest request, final NodeClient client, final boolean renderDefaults) {
ClusterStateRequest clusterStateRequest = Requests.clusterStateRequest().routingTable(false).nodes(false);
setUpRequestParams(clusterStateRequest, request);
return channel -> client.admin()
.cluster()
.state(
clusterStateRequest,
new RestToXContentListener(channel).map(
r -> response(
new ClusterGetSettingsAction.Response(
r.getState().metadata().persistentSettings(),
r.getState().metadata().transientSettings(),
r.getState().metadata().settings()
),
renderDefaults,
settingsFilter,
clusterSettings,
settings
)
)
);
}
@Override
protected Set responseParams() {
return Settings.FORMAT_PARAMS;
}
@Override
public boolean canTripCircuitBreaker() {
return false;
}
static RestClusterGetSettingsResponse response(
final ClusterGetSettingsAction.Response response,
final boolean renderDefaults,
final SettingsFilter settingsFilter,
final ClusterSettings clusterSettings,
final Settings settings
) {
return new RestClusterGetSettingsResponse(
settingsFilter.filter(response.persistentSettings()),
settingsFilter.filter(response.transientSettings()),
renderDefaults ? settingsFilter.filter(clusterSettings.diff(response.settings(), settings)) : Settings.EMPTY
);
}
}