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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.
*/
package org.apache.camel.support;
import java.util.Map;
import java.util.Set;
import org.apache.camel.AsyncProducer;
import org.apache.camel.CamelContext;
import org.apache.camel.CamelContextAware;
import org.apache.camel.Component;
import org.apache.camel.Consumer;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.ExchangePattern;
import org.apache.camel.PollingConsumer;
import org.apache.camel.spi.ExceptionHandler;
import org.apache.camel.spi.HasId;
import org.apache.camel.spi.Metadata;
import org.apache.camel.spi.PropertyConfigurer;
import org.apache.camel.spi.PropertyConfigurerAware;
import org.apache.camel.spi.PropertyConfigurerGetter;
import org.apache.camel.spi.UriParam;
import org.apache.camel.support.service.ServiceSupport;
import org.apache.camel.util.ObjectHelper;
import org.apache.camel.util.StringHelper;
import org.apache.camel.util.URISupport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Default {@link Endpoint}.
*/
public abstract class DefaultEndpoint extends ServiceSupport implements Endpoint, HasId, CamelContextAware {
private static final Logger LOG = LoggerFactory.getLogger(DefaultEndpoint.class);
private final String id = EndpointHelper.createEndpointId();
private transient String endpointUriToString;
private volatile String endpointUri;
private CamelContext camelContext;
private Component component;
@Metadata(label = "advanced", defaultValue = "true",
description = "Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as autowired)"
+ " by looking up in the registry to find if there is a single instance of matching type, which then gets configured on the component."
+ " This can be used for automatic configuring JDBC data sources, JMS connection factories, AWS Clients, etc."
+ " Important: If a component has the same option defined on both component and endpoint level, then disabling"
+ " autowiring on endpoint level would not affect that the component will still be autowired, and therefore the endpoint"
+ " will be configured with option from the component level. In other words turning off autowiring would then require to turn it off on the component level.")
private boolean autowiredEnabled = true;
@UriParam(label = "producer,advanced",
description = "Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup"
+ " in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then"
+ " the startup failure can be handled during routing messages via Camel's routing error handlers. Beware that when the first message is processed"
+ " then creating and starting the producer may take a little time and prolong the total processing time of the processing.")
private boolean lazyStartProducer;
@UriParam(label = "consumer,advanced",
description = "Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while"
+ " the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler."
+ " By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.")
private boolean bridgeErrorHandler;
@UriParam(label = "consumer,advanced", optionalPrefix = "consumer.",
description = "To let the consumer use a custom ExceptionHandler."
+ " Notice if the option bridgeErrorHandler is enabled then this option is not in use."
+ " By default the consumer will deal with exceptions, that will be logged at WARN or ERROR level and ignored.")
private ExceptionHandler exceptionHandler;
@UriParam(label = "consumer,advanced",
description = "Sets the exchange pattern when the consumer creates an exchange.")
// no default value set on @UriParam as the MEP is sometimes InOnly or InOut depending on the component in use
private ExchangePattern exchangePattern = ExchangePattern.InOnly;
// pooling consumer options only related to EventDrivenPollingConsumer which are very seldom in use
// so lets not expose them in the component docs as it will be included in every component
private int pollingConsumerQueueSize = 1000;
private boolean pollingConsumerBlockWhenFull = true;
private long pollingConsumerBlockTimeout;
private boolean pollingConsumerCopy;
/**
* Constructs a fully-initialized DefaultEndpoint instance. This is the preferred method of constructing an object
* from Java code (as opposed to Spring beans, etc.).
*
* @param endpointUri the full URI used to create this endpoint
* @param component the component that created this endpoint
*/
protected DefaultEndpoint(String endpointUri, Component component) {
this.component = component;
this.setEndpointUri(endpointUri);
if (component != null) {
this.camelContext = component.getCamelContext();
}
}
/**
* Constructs a partially-initialized DefaultEndpoint instance. Useful when creating endpoints manually (e.g., as
* beans in Spring).
*
* Please note that the endpoint URI must be set through properties (or overriding {@link #createEndpointUri()} if
* one uses this constructor.
*
* Note: It is preferred to create endpoints using the associated component.
*/
protected DefaultEndpoint() {
}
@Override
public int hashCode() {
return getEndpointUri().hashCode() * 37 + 1;
}
@Override
public boolean equals(Object object) {
if (object instanceof DefaultEndpoint) {
DefaultEndpoint that = (DefaultEndpoint) object;
// must also match the same CamelContext in case we compare endpoints from different contexts
String thisContextName = this.getCamelContext() != null ? this.getCamelContext().getName() : null;
String thatContextName = that.getCamelContext() != null ? that.getCamelContext().getName() : null;
return ObjectHelper.equal(this.getEndpointUri(), that.getEndpointUri())
&& ObjectHelper.equal(thisContextName, thatContextName);
}
return false;
}
@Override
public String toString() {
if (endpointUriToString == null) {
String value = null;
try {
value = getEndpointUri();
} catch (RuntimeException e) {
// ignore any exception and use null for building the string value
}
// ensure to sanitize uri so we do not show sensitive information such as passwords
endpointUriToString = URISupport.sanitizeUri(value);
}
return endpointUriToString;
}
/**
* Returns a unique String ID which can be used for aliasing without having to use the whole URI which is not unique
*/
@Override
public String getId() {
return id;
}
@Override
public String getEndpointUri() {
if (endpointUri == null) {
endpointUri = createEndpointUri();
if (endpointUri == null) {
throw new IllegalArgumentException(
"endpointUri is not specified and " + getClass().getName()
+ " does not implement createEndpointUri() to create a default value");
}
}
return endpointUri;
}
@Override
public String getEndpointKey() {
if (isLenientProperties()) {
// only use the endpoint uri without parameters as the properties are lenient
String uri = getEndpointUri();
if (uri.indexOf('?') != -1) {
return StringHelper.before(uri, "?");
} else {
return uri;
}
} else {
// use the full endpoint uri
return getEndpointUri();
}
}
@Override
public CamelContext getCamelContext() {
return camelContext;
}
@Override
public AsyncProducer createAsyncProducer() throws Exception {
if (isLazyStartProducer()) {
return new LazyStartProducer(this);
} else {
return AsyncProcessorConverterHelper.convert(createProducer());
}
}
/**
* Returns the component that created this endpoint, or null if none set.
*/
public Component getComponent() {
return component;
}
public void setComponent(Component component) {
this.component = component;
}
@Override
public void setCamelContext(CamelContext camelContext) {
this.camelContext = camelContext;
}
@Override
public PollingConsumer createPollingConsumer() throws Exception {
// should not call configurePollingConsumer when its EventDrivenPollingConsumer
if (LOG.isDebugEnabled()) {
LOG.debug("Creating EventDrivenPollingConsumer with queueSize: {} blockWhenFull: {} blockTimeout: {} copy: {}",
getPollingConsumerQueueSize(), isPollingConsumerBlockWhenFull(), getPollingConsumerBlockTimeout(),
isPollingConsumerCopy());
}
EventDrivenPollingConsumer consumer = new EventDrivenPollingConsumer(this, getPollingConsumerQueueSize());
consumer.setBlockWhenFull(isPollingConsumerBlockWhenFull());
consumer.setBlockTimeout(getPollingConsumerBlockTimeout());
consumer.setCopy(isPollingConsumerCopy());
return consumer;
}
@Override
public Exchange createExchange() {
return createExchange(exchangePattern);
}
@Override
public Exchange createExchange(ExchangePattern pattern) {
Exchange answer = new DefaultExchange(this, pattern);
configureExchange(answer);
return answer;
}
@Override
public void configureExchange(Exchange exchange) {
// noop
}
@Override
public ExchangePattern getExchangePattern() {
return exchangePattern;
}
/**
* Sets the default exchange pattern when creating an exchange.
*/
public void setExchangePattern(ExchangePattern exchangePattern) {
this.exchangePattern = exchangePattern;
}
public boolean isAutowiredEnabled() {
return autowiredEnabled;
}
/**
* Whether autowiring is enabled. This is used for automatic autowiring options (the option must be marked as
* autowired) by looking up in the registry to find if there is a single instance of matching type, which then gets
* configured on the component. This can be used for automatic configuring JDBC data sources, JMS connection
* factories, AWS Clients, etc. Important: If a component has the same option defined on both component and endpoint
* level, then disabling autowiring on endpoint level would not affect that the component will still be autowired,
* and therefore the endpoint will be configured with option from the component level. In other words turning off
* autowiring would then require to turn it off on the component level.
*/
public void setAutowiredEnabled(boolean autowiredEnabled) {
this.autowiredEnabled = autowiredEnabled;
}
public boolean isLazyStartProducer() {
return lazyStartProducer;
}
/**
* Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow
* CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause
* the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled
* during routing messages via Camel's routing error handlers. Beware that when the first message is processed then
* creating and starting the producer may take a little time and prolong the total processing time of the
* processing.
*/
public void setLazyStartProducer(boolean lazyStartProducer) {
this.lazyStartProducer = lazyStartProducer;
}
public boolean isBridgeErrorHandler() {
return bridgeErrorHandler;
}
/**
* Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the
* consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by
* the routing Error Handler.
*
* By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be
* logged at WARN/ERROR level and ignored.
*/
public void setBridgeErrorHandler(boolean bridgeErrorHandler) {
this.bridgeErrorHandler = bridgeErrorHandler;
}
public ExceptionHandler getExceptionHandler() {
return exceptionHandler;
}
/**
* To let the consumer use a custom ExceptionHandler. Notice if the option bridgeErrorHandler is enabled then this
* options is not in use. By default the consumer will deal with exceptions, that will be logged at WARN/ERROR level
* and ignored.
*/
public void setExceptionHandler(ExceptionHandler exceptionHandler) {
this.exceptionHandler = exceptionHandler;
}
public int getPollingConsumerQueueSize() {
return pollingConsumerQueueSize;
}
/**
* Sets the {@link org.apache.camel.PollingConsumer} queue size, when {@link EventDrivenPollingConsumer} is being
* used. Notice some Camel components may have their own implementation of {@link org.apache.camel.PollingConsumer}
* and therefore not using the default {@link EventDrivenPollingConsumer} implementation.
*
* The default value is 1000
*/
public void setPollingConsumerQueueSize(int pollingConsumerQueueSize) {
this.pollingConsumerQueueSize = pollingConsumerQueueSize;
}
public boolean isPollingConsumerBlockWhenFull() {
return pollingConsumerBlockWhenFull;
}
/**
* Set whether to block when adding to the internal queue off when {@link EventDrivenPollingConsumer} is being used.
* Notice some Camel components may have their own implementation of {@link org.apache.camel.PollingConsumer} and
* therefore not using the default {@link EventDrivenPollingConsumer} implementation.
*
* Setting this option to false, will result in an {@link java.lang.IllegalStateException} being thrown
* when trying to add to the queue, and it is full.
*
* The default value is true which will block the producer queue until the queue has space.
*/
public void setPollingConsumerBlockWhenFull(boolean pollingConsumerBlockWhenFull) {
this.pollingConsumerBlockWhenFull = pollingConsumerBlockWhenFull;
}
public long getPollingConsumerBlockTimeout() {
return pollingConsumerBlockTimeout;
}
/**
* Sets the timeout in millis to use when adding to the internal queue off when {@link EventDrivenPollingConsumer}
* is being used.
*
* @see #setPollingConsumerBlockWhenFull(boolean)
*/
public void setPollingConsumerBlockTimeout(long pollingConsumerBlockTimeout) {
this.pollingConsumerBlockTimeout = pollingConsumerBlockTimeout;
}
public boolean isPollingConsumerCopy() {
return pollingConsumerCopy;
}
/**
* Sets whether to copy the exchange when adding to the internal queue off when {@link EventDrivenPollingConsumer}
* is being used.
*
* Important: When copy is enabled then the unit of work is handed over from the current exchange to the
* copied exchange instance. And therefore its the responsible of the {@link PollingConsumer} to done the unit of
* work on the received exchanges. When the polled exchange is no longer needed then MUST call
* {@link org.apache.camel.spi.UnitOfWork#done(Exchange)}.
*
* Default is false to not copy.
*/
public void setPollingConsumerCopy(boolean pollingConsumerCopy) {
this.pollingConsumerCopy = pollingConsumerCopy;
}
@Override
public void configureProperties(Map options) {
setProperties(this, options);
}
/**
* Sets the bean properties on the given bean.
*
* This is the same logical implementation as {@link DefaultComponent#setProperties(Object, java.util.Map)}
*
* @param bean the bean
* @param parameters properties to set
*/
public void setProperties(Object bean, Map parameters) {
if (parameters == null || parameters.isEmpty()) {
return;
}
PropertyConfigurer configurer = null;
if (bean instanceof Component) {
configurer = getComponent().getComponentPropertyConfigurer();
} else if (bean instanceof Endpoint) {
configurer = getComponent().getEndpointPropertyConfigurer();
} else if (bean instanceof PropertyConfigurerAware) {
configurer = ((PropertyConfigurerAware) bean).getPropertyConfigurer(bean);
}
// use configurer and ignore case as end users may type an option name with mixed case
PropertyBindingSupport.build().withConfigurer(configurer).withIgnoreCase(true)
// if the endpoint is lenient then use optional
.withOptional(isLenientProperties())
.bind(camelContext, bean, parameters);
}
/**
* A factory method to lazily create the endpointUri if none is specified
*/
protected String createEndpointUri() {
return null;
}
/**
* Sets the endpointUri if it has not been specified yet via some kind of dependency injection mechanism. This
* allows dependency injection frameworks such as Spring to set the default endpoint URI in cases where it has not
* been explicitly configured using the name/context in which an Endpoint is created.
*/
public void setEndpointUriIfNotSpecified(String value) {
if (endpointUri == null) {
setEndpointUri(value);
}
}
/**
* Sets the URI that created this endpoint.
*/
protected void setEndpointUri(String endpointUri) {
this.endpointUri = endpointUri;
}
/**
* An endpoint should favour to be singleton by default, only in some rare special cases can an endpoint be
* non-singleton. This implementation is singleton and this method returns true.
*/
@Override
public boolean isSingleton() {
return true;
}
@Override
public boolean isLenientProperties() {
// default should be false for most components
return false;
}
protected void configureConsumer(Consumer consumer) throws Exception {
// inject CamelContext
CamelContextAware.trySetCamelContext(consumer, camelContext);
if (bridgeErrorHandler) {
if (consumer instanceof DefaultConsumer) {
DefaultConsumer defaultConsumer = (DefaultConsumer) consumer;
defaultConsumer.setExceptionHandler(new BridgeExceptionHandlerToErrorHandler(defaultConsumer));
} else {
throw new IllegalArgumentException(
"Option bridgeErrorHandler is only supported by endpoints,"
+ " having their consumer extend DefaultConsumer. The consumer is a "
+ consumer.getClass().getName() + " class.");
}
}
if (exceptionHandler != null) {
if (consumer instanceof DefaultConsumer) {
DefaultConsumer defaultConsumer = (DefaultConsumer) consumer;
defaultConsumer.setExceptionHandler(exceptionHandler);
}
}
}
protected void configurePollingConsumer(PollingConsumer consumer) throws Exception {
configureConsumer(consumer);
}
@Override
protected void doInit() throws Exception {
ObjectHelper.notNull(getCamelContext(), "camelContext");
if (autowiredEnabled && getComponent() != null && getComponent().isAutowiredEnabled()) {
PropertyConfigurer configurer = getComponent().getEndpointPropertyConfigurer();
if (configurer instanceof PropertyConfigurerGetter) {
PropertyConfigurerGetter getter = (PropertyConfigurerGetter) configurer;
String[] names = getter.getAutowiredNames();
if (names != null) {
for (String name : names) {
// is there already a configured value?
Object value = getter.getOptionValue(this, name, true);
if (value == null) {
Class type = getter.getOptionType(name, true);
if (type != null) {
Set set = camelContext.getRegistry().findByType(type);
if (set.size() == 1) {
value = set.iterator().next();
}
}
if (value != null) {
boolean hit = configurer.configure(camelContext, this, name, value, true);
if (hit) {
if (LOG.isDebugEnabled()) {
LOG.debug(
"Autowired property: {} on endpoint: {} as exactly one instance of type: {} ({}) found in the registry",
name, toString(), type.getName(), value.getClass().getName());
}
}
}
}
}
}
}
}
}
@Override
protected void doStart() throws Exception {
// noop
}
@Override
protected void doStop() throws Exception {
// noop
}
}
