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ElideStandalone.java
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ElideStandalone.java
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/*
* Copyright 2017, Yahoo Inc.
* Licensed under the Apache License, Version 2.0
* See LICENSE file in project root for terms.
*/
package com.yahoo.elide.standalone;
import static com.yahoo.elide.standalone.config.ElideResourceConfig.ASYNC_EXECUTOR_ATTR;
import static com.yahoo.elide.standalone.config.ElideResourceConfig.ASYNC_UPDATER_ATTR;
import static com.yahoo.elide.standalone.config.ElideResourceConfig.ELIDE_STANDALONE_SETTINGS_ATTR;
import com.yahoo.elide.async.service.AsyncExecutorService;
import com.yahoo.elide.core.security.checks.Check;
import com.yahoo.elide.standalone.config.ElideResourceConfig;
import com.yahoo.elide.standalone.config.ElideStandaloneSettings;
import com.yahoo.elide.standalone.config.ElideStandaloneSubscriptionSettings;
import org.eclipse.jetty.ee10.servlet.FilterHolder;
import org.eclipse.jetty.ee10.servlet.ServletContextHandler;
import org.eclipse.jetty.ee10.servlet.ServletHolder;
import org.eclipse.jetty.ee10.websocket.jakarta.server.config.JakartaWebSocketServletContainerInitializer;
import org.eclipse.jetty.server.Server;
import org.glassfish.jersey.servlet.ServletContainer;
import io.dropwizard.metrics.servlet.InstrumentedFilter;
import io.dropwizard.metrics.servlets.AdminServlet;
import io.dropwizard.metrics.servlets.HealthCheckServlet;
import io.dropwizard.metrics.servlets.MetricsServlet;
import jakarta.servlet.DispatcherType;
import lombok.extern.slf4j.Slf4j;
import java.util.EnumSet;
import java.util.Map;
import java.util.concurrent.Executors;
/**
* Elide Standalone.
*/
@Slf4j
public class ElideStandalone {
private final ElideStandaloneSettings elideStandaloneSettings;
private Server jettyServer;
/**
* Constructor.
*
* @param elideStandaloneSettings Elide standalone configuration settings.
*/
public ElideStandalone(ElideStandaloneSettings elideStandaloneSettings) {
this.elideStandaloneSettings = elideStandaloneSettings;
}
/**
* Constructor.
*
* @param checkMappings Check mappings to use for service.
*/
public ElideStandalone(Map<String, Class<? extends Check>> checkMappings) {
this(new ElideStandaloneSettings() {
@Override
public Map<String, Class<? extends Check>> getCheckMappings() {
return checkMappings;
}
});
}
/**
* Start the Elide service.
* This method blocks until the server exits.
*
* @throws Exception Exception thrown
*/
public void start() throws Exception {
start(true);
}
/**
* Start the Elide service.
*
* @param block - Whether or not to wait for the server to shutdown.
* @throws Exception Exception thrown
*/
public void start(boolean block) throws Exception {
ServletContextHandler context = new ServletContextHandler();
context.setContextPath("/");
log.info("Starting jetty server on port: {}", elideStandaloneSettings.getPort());
jettyServer = new Server(elideStandaloneSettings.getPort());
jettyServer.setHandler(context);
context.setAttribute(ELIDE_STANDALONE_SETTINGS_ATTR, elideStandaloneSettings);
if (elideStandaloneSettings.getAsyncProperties().enabled()) {
Integer threadPoolSize = elideStandaloneSettings.getAsyncProperties().getThreadSize() == null
? AsyncExecutorService.DEFAULT_THREAD_POOL_SIZE
: elideStandaloneSettings.getAsyncProperties().getThreadSize();
context.setAttribute(ASYNC_EXECUTOR_ATTR, Executors.newFixedThreadPool(threadPoolSize));
context.setAttribute(ASYNC_UPDATER_ATTR, Executors.newFixedThreadPool(threadPoolSize));
}
if (elideStandaloneSettings.enableJsonApi()) {
ServletHolder jerseyServlet = context.addServlet(ServletContainer.class,
elideStandaloneSettings.getJsonApiPathSpec());
jerseyServlet.setInitOrder(0);
jerseyServlet.setInitParameter("jersey.config.server.provider.packages",
"com.yahoo.elide.jsonapi.resources");
jerseyServlet.setInitParameter("jakarta.ws.rs.Application", ElideResourceConfig.class.getCanonicalName());
}
if (elideStandaloneSettings.enableGraphQL()) {
ServletHolder jerseyServlet = context.addServlet(ServletContainer.class,
elideStandaloneSettings.getGraphQLApiPathSpec());
jerseyServlet.setInitOrder(0);
jerseyServlet.setInitParameter("jersey.config.server.provider.packages", "com.yahoo.elide.graphql");
jerseyServlet.setInitParameter("jakarta.ws.rs.Application", ElideResourceConfig.class.getCanonicalName());
}
ElideStandaloneSubscriptionSettings subscriptionSettings = elideStandaloneSettings.getSubscriptionProperties();
if (elideStandaloneSettings.enableGraphQL() && subscriptionSettings.enabled()) {
// GraphQL subscription endpoint
JakartaWebSocketServletContainerInitializer.configure(context, (servletContext, serverContainer) -> {
serverContainer.addEndpoint(subscriptionSettings.serverEndpointConfig(elideStandaloneSettings, false));
});
JakartaWebSocketServletContainerInitializer.configure(context, (servletContext, serverContainer) -> {
serverContainer.addEndpoint(subscriptionSettings.serverEndpointConfig(elideStandaloneSettings, true));
});
}
if (elideStandaloneSettings.getAsyncProperties().enableExport()) {
ServletHolder jerseyServlet = context.addServlet(ServletContainer.class,
elideStandaloneSettings.getAsyncProperties().getExportApiPathSpec());
jerseyServlet.setInitOrder(0);
jerseyServlet.setInitParameter("jersey.config.server.provider.packages",
"com.yahoo.elide.async.resources");
jerseyServlet.setInitParameter("jakarta.ws.rs.Application", ElideResourceConfig.class.getCanonicalName());
}
if (elideStandaloneSettings.enableServiceMonitoring()) {
FilterHolder instrumentedFilterHolder = new FilterHolder(InstrumentedFilter.class);
instrumentedFilterHolder.setName("instrumentedFilter");
instrumentedFilterHolder.setAsyncSupported(true);
context.addFilter(instrumentedFilterHolder,
"/*",
EnumSet.of(DispatcherType.REQUEST));
context.setAttribute(HealthCheckServlet.HEALTH_CHECK_REGISTRY,
ElideResourceConfig.getHealthCheckRegistry());
context.setAttribute(InstrumentedFilter.REGISTRY_ATTRIBUTE, ElideResourceConfig.getMetricRegistry());
context.setAttribute(MetricsServlet.METRICS_REGISTRY, ElideResourceConfig.getMetricRegistry());
context.addServlet(AdminServlet.class, "/stats/*");
}
if (elideStandaloneSettings.enableApiDocs()) {
ServletHolder jerseyServlet = context.addServlet(ServletContainer.class,
elideStandaloneSettings.getApiDocsPathSpec());
jerseyServlet.setInitOrder(0);
jerseyServlet.setInitParameter("jersey.config.server.provider.packages",
"com.yahoo.elide.swagger.resources");
jerseyServlet.setInitParameter("jakarta.ws.rs.Application", ElideResourceConfig.class.getCanonicalName());
}
elideStandaloneSettings.updateServletContextHandler(context);
try {
jettyServer.start();
log.info("Jetty started!");
if (block) {
jettyServer.join();
}
} catch (Exception e) {
log.error("Unexpected exception caught: {}", e.getMessage(), e);
throw e;
} finally {
if (block) {
jettyServer.destroy();
}
}
}
/**
* Stop the Elide service.
*
* @throws Exception Exception thrown
*/
public void stop() throws Exception {
jettyServer.stop();
jettyServer.destroy();
}
}