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package org.apache.camel.impl; |
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import org.apache.camel.CamelContext; |
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import org.apache.camel.Component; |
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import org.apache.camel.Endpoint; |
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import org.apache.camel.Exchange; |
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import org.apache.camel.ResolveEndpointFailedException; |
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import org.apache.camel.Route; |
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import org.apache.camel.RuntimeCamelException; |
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import org.apache.camel.Service; |
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import org.apache.camel.TypeConverter; |
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import org.apache.camel.builder.RouteBuilder; |
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import org.apache.camel.impl.converter.DefaultTypeConverter; |
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import org.apache.camel.spi.ComponentResolver; |
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import org.apache.camel.spi.ExchangeConverter; |
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import org.apache.camel.spi.Injector; |
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import org.apache.camel.util.FactoryFinder; |
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import org.apache.camel.util.NoFactoryAvailableException; |
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import org.apache.camel.util.ObjectHelper; |
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import static org.apache.camel.util.ServiceHelper.startServices; |
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import static org.apache.camel.util.ServiceHelper.stopServices; |
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import java.io.IOException; |
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import java.util.ArrayList; |
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import java.util.Collection; |
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import java.util.HashMap; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.concurrent.Callable; |
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public class DefaultCamelContext extends ServiceSupport implements CamelContext, Service { |
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private Map<String, Endpoint> endpoints = new HashMap<String, Endpoint>(); |
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private Map<String, Component> components = new HashMap<String, Component>(); |
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private List<Route> routes; |
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private List<Service> servicesToClose = new ArrayList<Service>(); |
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private TypeConverter typeConverter; |
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private ExchangeConverter exchangeConverter; |
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private Injector injector; |
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private ComponentResolver componentResolver; |
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private boolean autoCreateComponents = true; |
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public void addComponent(String componentName, final Component component) { |
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if (component == null) { |
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throw new IllegalArgumentException("Component cannot be null"); |
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} |
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synchronized (components) { |
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if (components.containsKey(componentName)) { |
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throw new IllegalArgumentException("Component previously added: " + componentName); |
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} |
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component.setCamelContext(this); |
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components.put(componentName, component); |
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} |
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} |
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public Component getComponent(String name) { |
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synchronized (components) { |
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Component component = components.get(name); |
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if (component == null && autoCreateComponents) { |
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try { |
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component = getComponentResolver().resolveComponent(name, this); |
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if (component != null) { |
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addComponent(name, component); |
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if (isStarted()) { |
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startServices(component); |
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} |
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} |
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} |
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catch (Exception e) { |
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throw new RuntimeCamelException("Could not auto create component: " + name, e); |
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} |
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} |
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return component; |
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} |
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} |
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public <T extends Component> T getComponent(String name, Class<T> componentType) { |
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Component component = getComponent(name); |
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if (componentType.isInstance(component)) { |
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return componentType.cast(component); |
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} |
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else { |
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throw new IllegalArgumentException("The component is not of type: " + componentType + " but is: " + component); |
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} |
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} |
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public Component removeComponent(String componentName) { |
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synchronized (components) { |
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return components.remove(componentName); |
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} |
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} |
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public Component getOrCreateComponent(String componentName, Callable<Component> factory) { |
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synchronized (components) { |
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Component component = components.get(componentName); |
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if (component == null) { |
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try { |
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component = factory.call(); |
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if (component == null) { |
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throw new RuntimeCamelException("Factory failed to create the " + componentName + " component, it returned null."); |
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} |
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components.put(componentName, component); |
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component.setCamelContext(this); |
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} |
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catch (Exception e) { |
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throw new RuntimeCamelException("Factory failed to create the " + componentName + " component", e); |
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} |
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} |
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return component; |
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} |
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} |
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public Collection<Endpoint> getSingletonEndpoints() { |
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synchronized (endpoints) { |
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return new ArrayList<Endpoint>(endpoints.values()); |
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} |
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} |
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public Endpoint addSingletonEndpoint(String uri, Endpoint endpoint) throws Exception { |
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Endpoint oldEndpoint; |
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synchronized (endpoints) { |
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startServices(endpoint); |
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oldEndpoint = endpoints.remove(uri); |
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endpoints.put(uri, endpoint); |
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stopServices(oldEndpoint); |
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} |
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return oldEndpoint; |
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} |
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public Endpoint removeSingletonEndpoint(String uri) throws Exception { |
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Endpoint oldEndpoint; |
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synchronized (endpoints) { |
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oldEndpoint = endpoints.remove(uri); |
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stopServices(oldEndpoint); |
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} |
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return oldEndpoint; |
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} |
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public Endpoint getEndpoint(String uri) { |
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Endpoint answer; |
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synchronized (endpoints) { |
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answer = endpoints.get(uri); |
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if (answer == null) { |
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try { |
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String splitURI[] = ObjectHelper.splitOnCharacter(uri, ":", 2); |
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if (splitURI[1] == null) { |
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throw new IllegalArgumentException("Invalid URI, it did not contain a scheme: " + uri); |
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} |
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String scheme = splitURI[0]; |
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Component component = getComponent(scheme); |
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if (component != null) { |
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answer = component.createEndpoint(uri); |
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if (answer != null && answer.isSingleton()) { |
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if (answer != null) { |
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startServices(answer); |
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endpoints.put(uri, answer); |
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} |
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} |
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} |
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} |
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catch (Exception e) { |
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throw new ResolveEndpointFailedException(uri, e); |
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} |
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} |
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} |
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return answer; |
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} |
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public <T extends Endpoint> T getEndpoint(String name, Class<T> endpointType) { |
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Endpoint endpoint = getEndpoint(name); |
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if (endpointType.isInstance(endpoint)) { |
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return endpointType.cast(endpoint); |
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} |
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else { |
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throw new IllegalArgumentException("The endpoint is not of type: " + endpointType + " but is: " + endpoint); |
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} |
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} |
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public List<Route> getRoutes() { |
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return routes; |
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} |
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public void setRoutes(List<Route> routes) { |
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this.routes = routes; |
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} |
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public void addRoutes(Collection<Route> routes) throws Exception { |
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if (this.routes == null) { |
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this.routes = new ArrayList<Route>(routes); |
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} |
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else { |
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this.routes.addAll(routes); |
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} |
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if (isStarted()) { |
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startRoutes(routes); |
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} |
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} |
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public void addRoutes(RouteBuilder builder) throws Exception { |
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builder.setContext(this); |
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addRoutes(builder.getRouteList()); |
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} |
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public ExchangeConverter getExchangeConverter() { |
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if (exchangeConverter == null) { |
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exchangeConverter = createExchangeConverter(); |
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} |
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return exchangeConverter; |
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} |
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public void setExchangeConverter(ExchangeConverter exchangeConverter) { |
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this.exchangeConverter = exchangeConverter; |
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} |
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public TypeConverter getTypeConverter() { |
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if (typeConverter == null) { |
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typeConverter = createTypeConverter(); |
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} |
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return typeConverter; |
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} |
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public void setTypeConverter(TypeConverter typeConverter) { |
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this.typeConverter = typeConverter; |
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} |
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public Injector getInjector() { |
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if (injector == null) { |
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injector = createInjector(); |
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} |
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return injector; |
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} |
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public void setInjector(Injector injector) { |
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this.injector = injector; |
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} |
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public ComponentResolver getComponentResolver() { |
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if (componentResolver == null) { |
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componentResolver = createComponentResolver(); |
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} |
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return componentResolver; |
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} |
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public void setComponentResolver(ComponentResolver componentResolver) { |
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this.componentResolver = componentResolver; |
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} |
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protected void doStart() throws Exception { |
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if (components != null) { |
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for (Component component : components.values()) { |
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startServices(component); |
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} |
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} |
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startRoutes(routes); |
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} |
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protected void doStop() throws Exception { |
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stopServices(servicesToClose); |
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if (components != null) { |
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for (Component component : components.values()) { |
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stopServices(component); |
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} |
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} |
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} |
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protected void startRoutes(Collection<Route> routeList) throws Exception { |
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if (routeList != null) { |
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for (Route<Exchange> route : routeList) { |
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List<Service> services = route.getServicesForRoute(); |
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servicesToClose.addAll(services); |
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startServices(services); |
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} |
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} |
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} |
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protected ExchangeConverter createExchangeConverter() { |
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return new DefaultExchangeConverter(); |
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} |
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protected TypeConverter createTypeConverter() { |
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return new DefaultTypeConverter(); |
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} |
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protected Injector createInjector() { |
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FactoryFinder finder = new FactoryFinder(); |
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try { |
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return (Injector) finder.newInstance("Injector"); |
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} |
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catch (NoFactoryAvailableException e) { |
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return new ReflectionInjector(); |
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} |
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catch (IllegalAccessException e) { |
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throw new RuntimeCamelException(e); |
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} |
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catch (InstantiationException e) { |
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throw new RuntimeCamelException(e); |
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} |
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catch (IOException e) { |
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throw new RuntimeCamelException(e); |
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} |
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catch (ClassNotFoundException e) { |
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throw new RuntimeCamelException(e); |
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} |
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} |
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protected ComponentResolver createComponentResolver() { |
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return new DefaultComponentResolver(); |
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} |
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public boolean isAutoCreateComponents() { |
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return autoCreateComponents; |
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} |
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public void setAutoCreateComponents(boolean autoCreateComponents) { |
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this.autoCreateComponents = autoCreateComponents; |
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} |
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} |