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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.restapi;
import com.yahoo.container.jdisc.HttpRequest;
import com.yahoo.container.jdisc.HttpResponse;
import com.yahoo.container.jdisc.LoggingRequestHandler;
import com.yahoo.container.jdisc.RequestHandlerSpec;
import com.yahoo.jdisc.Metric;
import java.util.concurrent.Executor;
/**
* @author bjorncs
*/
public abstract class RestApiRequestHandler<T extends RestApiRequestHandler<T>> extends LoggingRequestHandler {
private final RestApi restApi;
@FunctionalInterface public interface RestApiProvider<T> { RestApi createRestApi(T self); }
/**
* RestApi will usually refer to handler methods of subclass, which are not accessible before super constructor has completed.
* This is hack to leak reference to subclass instance's "this" reference.
* Caller must ensure that provider instance does not try to access any uninitialized fields.
*/
@SuppressWarnings("unchecked")
protected RestApiRequestHandler(LoggingRequestHandler.Context context, RestApiProvider<T> provider) {
super(context);
this.restApi = provider.createRestApi((T)this);
}
/**
* @see #RestApiRequestHandler(Context, RestApiProvider)
*/
@SuppressWarnings("unchecked")
protected RestApiRequestHandler(Executor executor, Metric metric, RestApiProvider<T> provider) {
super(executor, metric);
this.restApi = provider.createRestApi((T)this);
}
protected RestApiRequestHandler(LoggingRequestHandler.Context context, RestApi restApi) {
super(context);
this.restApi = restApi;
}
protected RestApiRequestHandler(Executor executor, Metric metric, RestApi restApi) {
super(executor, metric);
this.restApi = restApi;
}
@Override public final HttpResponse handle(HttpRequest request) { return restApi.handleRequest(request); }
@Override public RequestHandlerSpec requestHandlerSpec() { return restApi.requestHandlerSpec(); }
public RestApi restApi() { return restApi; }
}
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