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PluginCompositeRouterFunction.java
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PluginCompositeRouterFunction.java
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package run.halo.app.plugin;
import static run.halo.app.plugin.ExtensionContextRegistry.getInstance;
import com.google.common.collect.Iterables;
import java.util.List;
import org.springframework.context.support.AbstractApplicationContext;
import org.springframework.lang.NonNull;
import org.springframework.stereotype.Component;
import org.springframework.web.reactive.function.server.HandlerFunction;
import org.springframework.web.reactive.function.server.RouterFunction;
import org.springframework.web.reactive.function.server.RouterFunctions;
import org.springframework.web.reactive.function.server.ServerRequest;
import org.springframework.web.reactive.function.server.ServerResponse;
import reactor.core.publisher.Flux;
import reactor.core.publisher.Mono;
import run.halo.app.plugin.resources.ReverseProxyRouterFunctionRegistry;
/**
* A composite {@link RouterFunction} implementation for plugin.
*
* @author guqing
* @since 2.0.0
*/
@Component
public class PluginCompositeRouterFunction implements RouterFunction<ServerResponse> {
private final ReverseProxyRouterFunctionRegistry reverseProxyRouterFunctionFactory;
public PluginCompositeRouterFunction(
ReverseProxyRouterFunctionRegistry reverseProxyRouterFunctionFactory) {
this.reverseProxyRouterFunctionFactory = reverseProxyRouterFunctionFactory;
}
@Override
@NonNull
public Mono<HandlerFunction<ServerResponse>> route(@NonNull ServerRequest request) {
return Flux.fromIterable(routerFunctions())
.concatMap(routerFunction -> routerFunction.route(request))
.next();
}
@Override
public void accept(@NonNull RouterFunctions.Visitor visitor) {
routerFunctions().forEach(routerFunction -> routerFunction.accept(visitor));
}
@SuppressWarnings("unchecked")
private Iterable<RouterFunction<ServerResponse>> routerFunctions() {
getInstance().acquireReadLock();
try {
List<PluginApplicationContext> contexts = getInstance().getPluginApplicationContexts()
.stream()
.filter(AbstractApplicationContext::isActive)
.toList();
var rawRouterFunctions = contexts
.stream()
.flatMap(applicationContext -> applicationContext
.getBeanProvider(RouterFunction.class)
.orderedStream())
.map(router -> (RouterFunction<ServerResponse>) router)
.toList();
var reverseProxies = reverseProxyRouterFunctionFactory.getRouterFunctions();
return Iterables.concat(rawRouterFunctions, reverseProxies);
} finally {
getInstance().releaseReadLock();
}
}
}