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/*
* ====================================================================
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation. For more
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*/
package org.apache.hc.core5.http.nio.support;
import org.apache.hc.core5.function.Decorator;
import org.apache.hc.core5.function.Supplier;
import org.apache.hc.core5.http.HttpException;
import org.apache.hc.core5.http.HttpRequest;
import org.apache.hc.core5.http.HttpRequestMapper;
import org.apache.hc.core5.http.HttpStatus;
import org.apache.hc.core5.http.MisdirectedRequestException;
import org.apache.hc.core5.http.nio.AsyncServerExchangeHandler;
import org.apache.hc.core5.http.nio.HandlerFactory;
import org.apache.hc.core5.http.protocol.HttpContext;
import org.apache.hc.core5.util.Args;
/**
* Factory for {@link AsyncServerExchangeHandler} instances that make use
* of {@link HttpRequestMapper} to dispatch
* the request to a particular {@link AsyncServerExchangeHandler} for processing.
*
* @since 5.0
*/
public final class DefaultAsyncResponseExchangeHandlerFactory implements HandlerFactory {
private final HttpRequestMapper> mapper;
private final Decorator decorator;
public DefaultAsyncResponseExchangeHandlerFactory(
final HttpRequestMapper> mapper,
final Decorator decorator) {
this.mapper = Args.notNull(mapper, "Request handler mapper");
this.decorator = decorator;
}
public DefaultAsyncResponseExchangeHandlerFactory(final HttpRequestMapper> mapper) {
this(mapper, null);
}
private AsyncServerExchangeHandler createHandler(final HttpRequest request,
final HttpContext context) throws HttpException {
try {
final Supplier supplier = mapper.resolve(request, context);
return supplier != null
? supplier.get()
: new ImmediateResponseExchangeHandler(HttpStatus.SC_NOT_FOUND, "Resource not found");
} catch (final MisdirectedRequestException ex) {
return new ImmediateResponseExchangeHandler(HttpStatus.SC_MISDIRECTED_REQUEST,
"Not authoritative");
}
}
@Override
public AsyncServerExchangeHandler create(final HttpRequest request, final HttpContext context) throws HttpException {
final AsyncServerExchangeHandler handler = createHandler(request, context);
if (handler != null) {
return decorator != null ? decorator.decorate(handler) : handler;
}
return null;
}
}