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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.Locale;
import java.util.Map;
import java.util.Properties;
import java.util.Set;
import org.apache.camel.CamelContext;
import org.apache.camel.Endpoint;
import org.apache.camel.Exchange;
import org.apache.camel.ExtendedCamelContext;
import org.apache.camel.NamedNode;
import org.apache.camel.NoSuchBeanException;
import org.apache.camel.NoSuchEndpointException;
import org.apache.camel.spi.RouteStartupOrder;
import org.apache.camel.util.ObjectHelper;
import static org.apache.camel.util.ObjectHelper.isNotEmpty;
import static org.apache.camel.util.ObjectHelper.notNull;
/**
* A number of helper methods
*/
public final class CamelContextHelper {
public static final String MODEL_DOCUMENTATION_PREFIX = "org/apache/camel/model/";
/**
* Utility classes should not have a public constructor.
*/
private CamelContextHelper() {
}
/**
* Returns the mandatory endpoint for the given URI or the
* {@link org.apache.camel.NoSuchEndpointException} is thrown
*/
public static Endpoint getMandatoryEndpoint(CamelContext camelContext, String uri)
throws NoSuchEndpointException {
Endpoint endpoint = camelContext.getEndpoint(uri);
if (endpoint == null) {
throw new NoSuchEndpointException(uri);
} else {
return endpoint;
}
}
/**
* Returns the mandatory endpoint for the given URI and type or the
* {@link org.apache.camel.NoSuchEndpointException} is thrown
*/
public static T getMandatoryEndpoint(CamelContext camelContext, String uri, Class type) {
Endpoint endpoint = getMandatoryEndpoint(camelContext, uri);
return ObjectHelper.cast(type, endpoint);
}
/**
* Converts the given value to the requested type
*/
public static T convertTo(CamelContext context, Class type, Object value) {
notNull(context, "camelContext");
return context.getTypeConverter().convertTo(type, value);
}
/**
* Tried to convert the given value to the requested type
*/
public static T tryConvertTo(CamelContext context, Class type, Object value) {
notNull(context, "camelContext");
return context.getTypeConverter().tryConvertTo(type, value);
}
/**
* Converts the given value to the specified type throwing an {@link IllegalArgumentException}
* if the value could not be converted to a non null value
*/
public static T mandatoryConvertTo(CamelContext context, Class type, Object value) {
T answer = convertTo(context, type, value);
if (answer == null) {
throw new IllegalArgumentException("Value " + value + " converted to " + type.getName() + " cannot be null");
}
return answer;
}
/**
* Creates a new instance of the given type using the {@link org.apache.camel.spi.Injector} on the given
* {@link CamelContext}
*/
public static T newInstance(CamelContext context, Class beanType) {
return context.getInjector().newInstance(beanType);
}
/**
* Look up the given named bean in the {@link org.apache.camel.spi.Registry} on the
* {@link CamelContext}
*/
public static Object lookup(CamelContext context, String name) {
return context.getRegistry().lookupByName(name);
}
/**
* Look up the given named bean of the given type in the {@link org.apache.camel.spi.Registry} on the
* {@link CamelContext}
*/
public static T lookup(CamelContext context, String name, Class beanType) {
return context.getRegistry().lookupByNameAndType(name, beanType);
}
/**
* Look up the given named bean in the {@link org.apache.camel.spi.Registry} on the
* {@link CamelContext} and try to convert it to the given type.
*/
public static T lookupAndConvert(CamelContext context, String name, Class beanType) {
return tryConvertTo(context, beanType, lookup(context, name));
}
/**
* Look up a bean of the give type in the {@link org.apache.camel.spi.Registry} on the
* {@link CamelContext} returning an instance if only one bean is present,
*/
public static T findByType(CamelContext camelContext, Class type) {
Set set = camelContext.getRegistry().findByType(type);
if (set.size() == 1) {
return set.iterator().next();
}
return null;
}
/**
* Look up the given named bean in the {@link org.apache.camel.spi.Registry} on the
* {@link CamelContext} or throws {@link NoSuchBeanException} if not found.
*/
public static Object mandatoryLookup(CamelContext context, String name) {
Object answer = lookup(context, name);
if (answer == null) {
throw new NoSuchBeanException(name);
}
return answer;
}
/**
* Look up the given named bean of the given type in the {@link org.apache.camel.spi.Registry} on the
* {@link CamelContext} or throws NoSuchBeanException if not found.
*/
public static T mandatoryLookup(CamelContext context, String name, Class beanType) {
T answer = lookup(context, name, beanType);
if (answer == null) {
throw new NoSuchBeanException(name, beanType.getName());
}
return answer;
}
/**
* Look up the given named bean in the {@link org.apache.camel.spi.Registry} on the
* {@link CamelContext} and convert it to the given type or throws NoSuchBeanException if not found.
*/
public static T mandatoryLookupAndConvert(CamelContext context, String name, Class beanType) {
Object value = lookup(context, name);
if (value == null) {
throw new NoSuchBeanException(name, beanType.getName());
}
return convertTo(context, beanType, value);
}
/**
* Evaluates the @EndpointInject annotation using the given context
*/
public static Endpoint getEndpointInjection(CamelContext camelContext, String uri, String injectionPointName, boolean mandatory) {
Endpoint endpoint;
if (isNotEmpty(uri)) {
endpoint = camelContext.getEndpoint(uri);
} else {
if (mandatory) {
endpoint = mandatoryLookup(camelContext, injectionPointName, Endpoint.class);
} else {
endpoint = lookup(camelContext, injectionPointName, Endpoint.class);
}
}
return endpoint;
}
/**
* Gets the maximum cache pool size.
*
* Will use the property set on CamelContext with the key {@link Exchange#MAXIMUM_CACHE_POOL_SIZE}.
* If no property has been set, then it will fallback to return a size of 1000.
*
* @param camelContext the camel context
* @return the maximum cache size
* @throws IllegalArgumentException is thrown if the property is illegal
*/
public static int getMaximumCachePoolSize(CamelContext camelContext) throws IllegalArgumentException {
if (camelContext != null) {
String s = camelContext.getGlobalOption(Exchange.MAXIMUM_CACHE_POOL_SIZE);
if (s != null) {
try {
// we cannot use Camel type converters as they may not be ready this early
Integer size = Integer.valueOf(s);
if (size == null || size <= 0) {
throw new IllegalArgumentException("Property " + Exchange.MAXIMUM_CACHE_POOL_SIZE + " must be a positive number, was: " + s);
}
return size;
} catch (NumberFormatException e) {
throw new IllegalArgumentException("Property " + Exchange.MAXIMUM_CACHE_POOL_SIZE + " must be a positive number, was: " + s, e);
}
}
}
// 1000 is the default fallback
return 1000;
}
/**
* Gets the maximum endpoint cache size.
*
* Will use the property set on CamelContext with the key {@link Exchange#MAXIMUM_ENDPOINT_CACHE_SIZE}.
* If no property has been set, then it will fallback to return a size of 1000.
*
* @param camelContext the camel context
* @return the maximum cache size
* @throws IllegalArgumentException is thrown if the property is illegal
*/
public static int getMaximumEndpointCacheSize(CamelContext camelContext) throws IllegalArgumentException {
if (camelContext != null) {
String s = camelContext.getGlobalOption(Exchange.MAXIMUM_ENDPOINT_CACHE_SIZE);
if (s != null) {
// we cannot use Camel type converters as they may not be ready this early
try {
int size = Integer.parseInt(s);
if (size <= 0) {
throw new IllegalArgumentException("Property " + Exchange.MAXIMUM_ENDPOINT_CACHE_SIZE + " must be a positive number, was: " + s);
}
return size;
} catch (NumberFormatException e) {
throw new IllegalArgumentException("Property " + Exchange.MAXIMUM_ENDPOINT_CACHE_SIZE + " must be a positive number, was: " + s, e);
}
}
}
// 1000 is the default fallback
return 1000;
}
/**
* Gets the maximum simple cache size.
*
* Will use the property set on CamelContext with the key {@link Exchange#MAXIMUM_SIMPLE_CACHE_SIZE}.
* If no property has been set, then it will fallback to return a size of 1000.
*
* @param camelContext the camel context
* @return the maximum cache size
* @throws IllegalArgumentException is thrown if the property is illegal
*/
public static int getMaximumSimpleCacheSize(CamelContext camelContext) throws IllegalArgumentException {
if (camelContext != null) {
String s = camelContext.getGlobalOption(Exchange.MAXIMUM_SIMPLE_CACHE_SIZE);
if (s != null) {
// we cannot use Camel type converters as they may not be ready this early
try {
Integer size = Integer.valueOf(s);
if (size == null || size <= 0) {
throw new IllegalArgumentException("Property " + Exchange.MAXIMUM_SIMPLE_CACHE_SIZE + " must be a positive number, was: " + s);
}
return size;
} catch (NumberFormatException e) {
throw new IllegalArgumentException("Property " + Exchange.MAXIMUM_SIMPLE_CACHE_SIZE + " must be a positive number, was: " + s, e);
}
}
}
// 1000 is the default fallback
return 1000;
}
/**
* Gets the maximum transformer cache size.
*
* Will use the property set on CamelContext with the key {@link Exchange#MAXIMUM_TRANSFORMER_CACHE_SIZE}.
* If no property has been set, then it will fallback to return a size of 1000.
*
* @param camelContext the camel context
* @return the maximum cache size
* @throws IllegalArgumentException is thrown if the property is illegal
*/
public static int getMaximumTransformerCacheSize(CamelContext camelContext) throws IllegalArgumentException {
if (camelContext != null) {
String s = camelContext.getGlobalOption(Exchange.MAXIMUM_TRANSFORMER_CACHE_SIZE);
if (s != null) {
// we cannot use Camel type converters as they may not be ready this early
try {
Integer size = Integer.valueOf(s);
if (size == null || size <= 0) {
throw new IllegalArgumentException("Property " + Exchange.MAXIMUM_TRANSFORMER_CACHE_SIZE + " must be a positive number, was: " + s);
}
return size;
} catch (NumberFormatException e) {
throw new IllegalArgumentException("Property " + Exchange.MAXIMUM_TRANSFORMER_CACHE_SIZE + " must be a positive number, was: " + s, e);
}
}
}
// 1000 is the default fallback
return 1000;
}
/**
* Gets the maximum validator cache size.
*
* Will use the property set on CamelContext with the key {@link Exchange#MAXIMUM_VALIDATOR_CACHE_SIZE}.
* If no property has been set, then it will fallback to return a size of 1000.
*
* @param camelContext the camel context
* @return the maximum cache size
* @throws IllegalArgumentException is thrown if the property is illegal
*/
public static int getMaximumValidatorCacheSize(CamelContext camelContext) throws IllegalArgumentException {
if (camelContext != null) {
String s = camelContext.getGlobalOption(Exchange.MAXIMUM_VALIDATOR_CACHE_SIZE);
if (s != null) {
// we cannot use Camel type converters as they may not be ready this early
try {
Integer size = Integer.valueOf(s);
if (size == null || size <= 0) {
throw new IllegalArgumentException("Property " + Exchange.MAXIMUM_VALIDATOR_CACHE_SIZE + " must be a positive number, was: " + s);
}
return size;
} catch (NumberFormatException e) {
throw new IllegalArgumentException("Property " + Exchange.MAXIMUM_VALIDATOR_CACHE_SIZE + " must be a positive number, was: " + s, e);
}
}
}
// 1000 is the default fallback
return 1000;
}
/**
* Parses the given text and handling property placeholders as well
*
* @param camelContext the camel context
* @param text the text
* @return the parsed text, or null if the text was null
* @throws Exception is thrown if illegal argument
*/
public static String parseText(CamelContext camelContext, String text) throws Exception {
// ensure we support property placeholders
return camelContext.resolvePropertyPlaceholders(text);
}
/**
* Parses the given text and converts it to an Integer and handling property placeholders as well
*
* @param camelContext the camel context
* @param text the text
* @return the integer vale, or null if the text was null
* @throws Exception is thrown if illegal argument or type conversion not possible
*/
public static Integer parseInteger(CamelContext camelContext, String text) throws Exception {
// ensure we support property placeholders
String s = camelContext.resolvePropertyPlaceholders(text);
if (s != null) {
try {
return camelContext.getTypeConverter().mandatoryConvertTo(Integer.class, s);
} catch (NumberFormatException e) {
if (s.equals(text)) {
throw new IllegalArgumentException("Error parsing [" + s + "] as an Integer.", e);
} else {
throw new IllegalArgumentException("Error parsing [" + s + "] from property " + text + " as an Integer.", e);
}
}
}
return null;
}
/**
* Parses the given text and converts it to an Long and handling property placeholders as well
*
* @param camelContext the camel context
* @param text the text
* @return the long vale, or null if the text was null
* @throws Exception is thrown if illegal argument or type conversion not possible
*/
public static Long parseLong(CamelContext camelContext, String text) throws Exception {
// ensure we support property placeholders
String s = camelContext.resolvePropertyPlaceholders(text);
if (s != null) {
try {
return camelContext.getTypeConverter().mandatoryConvertTo(Long.class, s);
} catch (NumberFormatException e) {
if (s.equals(text)) {
throw new IllegalArgumentException("Error parsing [" + s + "] as a Long.", e);
} else {
throw new IllegalArgumentException("Error parsing [" + s + "] from property " + text + " as a Long.", e);
}
}
}
return null;
}
/**
* Parses the given text and converts it to a Double and handling property placeholders as well
*
* @param camelContext the camel context
* @param text the text
* @return the double vale, or null if the text was null
* @throws Exception is thrown if illegal argument or type conversion not possible
*/
public static Double parseDouble(CamelContext camelContext, String text) throws Exception {
// ensure we support property placeholders
String s = camelContext.resolvePropertyPlaceholders(text);
if (s != null) {
try {
return camelContext.getTypeConverter().mandatoryConvertTo(Double.class, s);
} catch (NumberFormatException e) {
if (s.equals(text)) {
throw new IllegalArgumentException("Error parsing [" + s + "] as an Integer.", e);
} else {
throw new IllegalArgumentException("Error parsing [" + s + "] from property " + text + " as an Integer.", e);
}
}
}
return null;
}
/**
* Parses the given text and converts it to an Boolean and handling property placeholders as well
*
* @param camelContext the camel context
* @param text the text
* @return the boolean vale, or null if the text was null
* @throws IllegalArgumentException is thrown if illegal argument or type conversion not possible
*/
public static Boolean parseBoolean(CamelContext camelContext, String text) {
// ensure we support property placeholders
String s = camelContext.resolvePropertyPlaceholders(text);
if (s != null) {
s = s.trim().toLowerCase(Locale.ENGLISH);
if (s.equals("true") || s.equals("false")) {
return "true".equals(s) ? Boolean.TRUE : Boolean.FALSE;
} else {
if (s.equals(text)) {
throw new IllegalArgumentException("Error parsing [" + s + "] as a Boolean.");
} else {
throw new IllegalArgumentException("Error parsing [" + s + "] from property " + text + " as a Boolean.");
}
}
}
return null;
}
/**
* Gets the route startup order for the given route id
*
* @param camelContext the camel context
* @param routeId the id of the route
* @return the startup order, or 0 if not possible to determine
*/
public static int getRouteStartupOrder(CamelContext camelContext, String routeId) {
for (RouteStartupOrder order : camelContext.adapt(ExtendedCamelContext.class).getRouteStartupOrder()) {
if (order.getRoute().getId().equals(routeId)) {
return order.getStartupOrder();
}
}
return 0;
}
/**
* A helper method to access a camel context properties with a prefix
*
* @param prefix the prefix
* @param camelContext the camel context
* @return the properties which holds the camel context properties with the prefix,
* and the key omit the prefix part
*/
public static Properties getCamelPropertiesWithPrefix(String prefix, CamelContext camelContext) {
Properties answer = new Properties();
Map camelProperties = camelContext.getGlobalOptions();
if (camelProperties != null) {
for (Map.Entry entry : camelProperties.entrySet()) {
String key = entry.getKey();
if (key != null && key.startsWith(prefix)) {
answer.put(key.substring(prefix.length()), entry.getValue());
}
}
}
return answer;
}
/**
* Gets the route id the given node belongs to.
*
* @param node the node
* @return the route id, or null if not possible to find
*/
public static String getRouteId(NamedNode node) {
NamedNode parent = node;
while (parent != null && parent.getParent() != null) {
parent = parent.getParent();
}
return parent != null ? parent.getId() : null;
}
}
