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The Core Camel Java DSL based router
/**
* 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.
*/
package org.apache.camel.builder;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import java.util.concurrent.Future;
import java.util.function.Consumer;
import java.util.function.Supplier;
import org.apache.camel.CamelContext;
import org.apache.camel.CamelExecutionException;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.ExchangePattern;
import org.apache.camel.FluentProducerTemplate;
import org.apache.camel.Message;
import org.apache.camel.Processor;
import org.apache.camel.ProducerTemplate;
import org.apache.camel.processor.ConvertBodyProcessor;
import org.apache.camel.support.ServiceSupport;
import org.apache.camel.util.ExchangeHelper;
import org.apache.camel.util.ObjectHelper;
import org.apache.camel.util.ServiceHelper;
public class DefaultFluentProducerTemplate extends ServiceSupport implements FluentProducerTemplate {
private final CamelContext context;
private final ClassValue resultProcessors;
private Map headers;
private Object body;
private Optional> templateCustomizer;
private Optional> exchangeSupplier;
private Optional> processorSupplier;
private Optional endpoint;
private Optional defaultEndpoint;
private int maximumCacheSize;
private boolean eventNotifierEnabled;
private volatile ProducerTemplate template;
public DefaultFluentProducerTemplate(CamelContext context) {
this.context = context;
this.endpoint = Optional.empty();
this.defaultEndpoint = Optional.empty();
this.eventNotifierEnabled = true;
this.templateCustomizer = Optional.empty();
this.exchangeSupplier = Optional.empty();
this.processorSupplier = Optional.empty();
this.resultProcessors = new ClassValue() {
@Override
protected ConvertBodyProcessor computeValue(Class type) {
return new ConvertBodyProcessor(type);
}
};
}
@Override
public CamelContext getCamelContext() {
return context;
}
@Override
public int getCurrentCacheSize() {
if (template == null) {
return 0;
}
return template.getCurrentCacheSize();
}
@Override
public void cleanUp() {
if (template != null) {
template.cleanUp();
}
}
@Override
public void setDefaultEndpointUri(String endpointUri) {
setDefaultEndpoint(getCamelContext().getEndpoint(endpointUri));
}
@Override
public Endpoint getDefaultEndpoint() {
return defaultEndpoint.orElse(null);
}
@Override
public void setDefaultEndpoint(Endpoint defaultEndpoint) {
this.defaultEndpoint = Optional.ofNullable(defaultEndpoint);
}
@Override
public int getMaximumCacheSize() {
return maximumCacheSize;
}
@Override
public void setMaximumCacheSize(int maximumCacheSize) {
this.maximumCacheSize = maximumCacheSize;
}
@Override
public boolean isEventNotifierEnabled() {
return eventNotifierEnabled;
}
@Override
public void setEventNotifierEnabled(boolean eventNotifierEnabled) {
this.eventNotifierEnabled = eventNotifierEnabled;
}
@Override
public FluentProducerTemplate clearAll() {
clearBody();
clearHeaders();
return this;
}
@Override
public FluentProducerTemplate withHeader(String key, Object value) {
if (headers == null) {
headers = new HashMap<>();
}
headers.put(key, value);
return this;
}
@Override
public FluentProducerTemplate clearHeaders() {
if (headers != null) {
headers.clear();
}
return this;
}
@Override
public FluentProducerTemplate withBody(Object body) {
this.body = body;
return this;
}
@Override
public FluentProducerTemplate withBodyAs(Object body, Class type) {
this.body = type != null
? context.getTypeConverter().convertTo(type, body)
: body;
return this;
}
@Override
public FluentProducerTemplate clearBody() {
this.body = null;
return this;
}
@Override
public FluentProducerTemplate withTemplateCustomizer(final Consumer templateCustomizer) {
this.templateCustomizer = Optional.of(templateCustomizer);
return this;
}
@Override
public FluentProducerTemplate withExchange(final Exchange exchange) {
return withExchange(() -> exchange);
}
@Override
public FluentProducerTemplate withExchange(final Supplier exchangeSupplier) {
this.exchangeSupplier = Optional.of(exchangeSupplier);
return this;
}
@Override
public FluentProducerTemplate withProcessor(final Processor processor) {
return withProcessor(() -> processor);
}
@Override
public FluentProducerTemplate withProcessor(final Supplier processorSupplier) {
this.processorSupplier = Optional.of(processorSupplier);
return this;
}
@Override
public FluentProducerTemplate to(String endpointUri) {
return to(context.getEndpoint(endpointUri));
}
@Override
public FluentProducerTemplate to(Endpoint endpoint) {
this.endpoint = Optional.of(endpoint);
return this;
}
// ************************
// REQUEST
// ************************
@Override
public Object request() throws CamelExecutionException {
return request(Object.class);
}
@Override
@SuppressWarnings("unchecked")
public T request(Class type) throws CamelExecutionException {
// Determine the target endpoint
final Endpoint target = target();
// Create the default processor if not provided.
final Supplier processorSupplier = this.processorSupplier.orElse(() -> defaultProcessor());
T result;
if (type == Exchange.class) {
result = (T)template().request(target, processorSupplier.get());
} else if (type == Message.class) {
Exchange exchange = template().request(target, processorSupplier.get());
result = exchange.hasOut() ? (T)exchange.getOut() : (T)exchange.getIn();
} else {
Exchange exchange = template().send(
target,
ExchangePattern.InOut,
processorSupplier.get(),
resultProcessors.get(type)
);
result = context.getTypeConverter().convertTo(
type,
ExchangeHelper.extractResultBody(exchange, exchange.getPattern())
);
}
return result;
}
@Override
public Future