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ExtensionsInitRequestHandler.java
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ExtensionsInitRequestHandler.java
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/*
* Copyright OpenSearch Contributors
* SPDX-License-Identifier: Apache-2.0
*
* The OpenSearch Contributors require contributions made to
* this file be licensed under the Apache-2.0 license or a
* compatible open source license.
*/
package org.opensearch.sdk.handlers;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.opensearch.common.settings.Settings;
import org.opensearch.discovery.InitializeExtensionRequest;
import org.opensearch.discovery.InitializeExtensionResponse;
import org.opensearch.sdk.ExtensionsRunner;
import org.opensearch.sdk.SDKTransportService;
import org.opensearch.transport.TransportService;
import static org.opensearch.sdk.ExtensionsRunner.NODE_NAME_SETTING;
/**
* This class handles the request from OpenSearch to a {@link ExtensionsRunner#startTransportService(TransportService transportService)} call.
*/
public class ExtensionsInitRequestHandler {
private static final Logger logger = LogManager.getLogger(ExtensionsInitRequestHandler.class);
// The default http port setting of OpenSearch
private static final String DEFAULT_HTTP_PORT = "9200";
// The configured http port setting of opensearch.yml
private static final String HTTP_PORT_SETTING = "http.port";
private final ExtensionsRunner extensionsRunner;
/**
* Instantiate this object with a reference to the ExtensionsRunner
*
* @param extensionsRunner the ExtensionsRunner instance
*/
public ExtensionsInitRequestHandler(ExtensionsRunner extensionsRunner) {
this.extensionsRunner = extensionsRunner;
}
/**
* Handles a extension request from OpenSearch. This is the first request for the transport communication and will initialize the extension and will be a part of OpenSearch bootstrap.
*
* @param extensionInitRequest The request to handle.
* @return A response to OpenSearch validating that this is an extension.
*/
public InitializeExtensionResponse handleExtensionInitRequest(InitializeExtensionRequest extensionInitRequest) {
logger.info("Registering Extension Request received from OpenSearch");
extensionsRunner.getThreadPool().getThreadContext().putHeader("extension_unique_id", extensionInitRequest.getExtension().getId());
SDKTransportService sdkTransportService = extensionsRunner.getSdkTransportService();
sdkTransportService.setOpensearchNode(extensionInitRequest.getSourceNode());
sdkTransportService.setUniqueId(extensionInitRequest.getExtension().getId());
// Successfully initialized. Send the response.
try {
return new InitializeExtensionResponse(
extensionsRunner.getSettings().get(NODE_NAME_SETTING),
extensionsRunner.getExtensionImplementedInterfaces()
);
} finally {
// After sending successful response to initialization, send the REST API and Settings
extensionsRunner.setExtensionNode(extensionInitRequest.getExtension());
TransportService extensionTransportService = sdkTransportService.getTransportService();
extensionTransportService.connectToNodeAsExtension(
extensionInitRequest.getSourceNode(),
extensionInitRequest.getExtension().getId()
);
sdkTransportService.sendRegisterRestActionsRequest(extensionsRunner.getExtensionRestPathRegistry());
sdkTransportService.sendRegisterCustomSettingsRequest(extensionsRunner.getCustomSettings());
sdkTransportService.sendRegisterTransportActionsRequest(extensionsRunner.getSdkActionModule().getActions());
// Get OpenSearch Settings and set values on ExtensionsRunner
Settings settings = sdkTransportService.sendEnvironmentSettingsRequest();
extensionsRunner.setEnvironmentSettings(settings);
extensionsRunner.updateNamedXContentRegistry();
extensionsRunner.updateSdkClusterService();
// Use OpenSearch Settings to update client REST Connections
String openSearchNodeAddress = extensionInitRequest.getSourceNode().getAddress().getAddress();
String openSearchNodeHttpPort = settings.get(HTTP_PORT_SETTING) != null ? settings.get(HTTP_PORT_SETTING) : DEFAULT_HTTP_PORT;
extensionsRunner.getSdkClient().updateOpenSearchNodeSettings(openSearchNodeAddress, openSearchNodeHttpPort);
// Last step of initialization
// TODO: make sure all the other sendX methods have completed
// https://github.com/opensearch-project/opensearch-sdk-java/issues/17
extensionsRunner.setInitialized();
// Trigger pending updates requiring completion of the above actions
extensionsRunner.getSdkClusterService().getClusterSettings().sendPendingSettingsUpdateConsumers();
}
}
}