I am getting an exception Dispatcher has no subscribers on the outboundChannel and can't figure out why. I am sure its something simple, I have stripped back my code to a very simple sample below:
My context is:
<bean id="requestService"
class="com.sandpit.RequestService" />
<integration:channel id="inboundChannel" />
<integration:service-activator id="service"
input-channel="inboundChannel"
output-channel="outboundChannel"
ref="requestService"
method="handleRequest" />
<integration:channel id="outboundChannel" />
<integration:gateway id="gateway"
service-interface="com.sandpit.Gateway"
default-request-channel="inboundChannel"
default-reply-channel="outboundChannel" />
<bean class="com.sandpit.GatewayTester">
<property name="gateway"
ref="gateway" />
</bean>
My Java code is:
public interface Gateway {
String receive();
void send(String message);
}
public class RequestService {
public String handleRequest(String request) {
return "Request received: " + request;
}
}
public class GatewayTester implements ApplicationListener<ContextRefreshedEvent> {
private Gateway gateway;
public void setGateway(Gateway gateway) {
this.gateway = gateway;
}
#Override
public void onApplicationEvent(ContextRefreshedEvent event) {
gateway.send("Hello world!");
System.out.println("FROM SERVICE: " + gateway.receive());
}
}
Note: A breakpoint does tell me that the RequestService is actually handling the request.
receive() with no args needs the reply channel to be a PollableChannel See the documentation.
add <queue/> to the outboundChannel.
Alternatively, You could change your gateway method to be String sendAndReceive(String in) and all will work as expected (and you can even remove the outboundChannel altogether).
Related
From what I've read of the Spring #ContextConfiguration annotation, it's possible to load multiple XML context files, or multiple JavaConfig classes. What I need is to load from one XML context file and one class. All the examples I've seen either load all XML, or all classes, but not both.
I'm trying to do this because I want my test class, which is just there to verify expected Spring wiring, to load my default applicationContext.xml file (presently just a copy stored in "src/test/resources, and trying to figure out how to directly specify the default one) along with a JavaConfig class that specifies some JNDI resources that need to be available. For the purposes of my test, I only need to set those JNDI resources to dummy strings, but I'd really like to specify them in an inline static class instead of an external XML file, because my tests are going to have to verify that some settings are equal to those dummy strings, and it's more maintainable if both the values and the checks are in the same file.
What I have so far, and what I've tried, can be illustrated with this:
#RunWith(SpringRunner.class)
#ContextConfiguration(value = {"/testApplicationContext.xml", "/testResources.xml"})
//#ContextHierarchy({
// #ContextConfiguration("/testApplicationContext.xml"),
// #ContextConfiguration(classes = SpringWiringTest.Config.class)
//})
#TestPropertySource(properties = { "env = tomcat", "doNotifications = false" })
public class SpringWiringTest {
And this at the end of the class:
#Configuration
public static class Config {
#Bean public String uslDatasourcesList() { return "abc"; }
#Bean public String atgDatasourcesList() { return "abc"; }
#Bean public String uslTableNamePrefixsList() { return "abc"; }
#Bean public String atgTableNamePrefixsList() { return "abc"; }
#Bean public String doNotifications() { return "false"; }
#Bean public DataSource abc() { return new DriverManagerDataSource(); }
}
If I comment out the first #ContextConfiguration and comment back in the #ContextHierarchy block, I get an error like this:
Error creating bean with name 'uslDatasourcesList': Invocation of init
method failed; nested exception is
javax.naming.NoInitialContextException: Need to specify class name in
environment or system property, or as an applet parameter, or in an
application resource file: java.naming.factory.initial
Update:
Using the guideline of picking either JavaConfig or XML as the "entry point" to configuration, here are some modified excerpts that show what I'm trying:
#RunWith(SpringRunner.class)
#ContextConfiguration
//#ContextConfiguration(value = {"file:src/main/webapp/WEB-INF/applicationContext.xml", "/testResources.xml"})
#TestPropertySource(properties = { "env = tomcat", "doNotifications = false" })
public class SpringWiringTest {
...
#BeforeClass
public static void setup() throws Exception {
SimpleNamingContextBuilder builder = SimpleNamingContextBuilder.emptyActivatedContextBuilder();
DataSource ds = new DriverManagerDataSource();
builder.bind("java:comp/env/abc", ds);
}
...
#Configuration
#ImportResource("file:src/main/webapp/WEB-INF/applicationContext.xml")
public static class Config {
#Bean public String uslDatasourcesList() { return "abc"; }
#Bean public String atgDatasourcesList() { return "abc"; }
#Bean public String uslTableNamePrefixsList() { return "abc"; }
#Bean public String atgTableNamePrefixsList() { return "abc"; }
#Bean public String doNotifications() { return "false"; }
#Bean public DataSource abc() { return new DriverManagerDataSource(); }
}
}
When I run my test, the bottom "Caused by" in the exception says this:
Caused by: javax.naming.NameNotFoundException: Name
[uslDatasourcesList] not bound; 1 bindings: [java:comp/env/abc]
In the alternate version, using the commented-out "#ContextConfiguration" (and commenting out the Config class and its annotations), this error does not occur.
Note that this the meat of my "testResources.xml" file:
<bean id="uslDatasourcesList" class="java.lang.String"> <constructor-arg value="abc"/> </bean>
<bean id="atgDatasourcesList" class="java.lang.String"> <constructor-arg value="abc"/> </bean>
<bean id="uslTableNamePrefixList" class="java.lang.String"> <constructor-arg value="abc"/> </bean>
<bean id="atgTableNamePrefixList" class="java.lang.String"> <constructor-arg value="abc"/> </bean>
<bean id="doNotifications" class="java.lang.String"> <constructor-arg value="false"/> </bean>
<bean id="abc" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
</bean>
Note that the bean mentioned in the error message, "uslDatasourcesList" is defined in both versions, but it's not working in the version with JavaConfig and XML mixed.
It almost appears that the beans in the "#ImportResource" annotation are evaluated on their own, before the beans declared in the JavaConfig class are merged into it.
This is clearly documented in the Spring Reference Manual in the section named Mixing XML, Groovy scripts, and annotated classes.
In summary, ...
... you will have to pick one as the entry point, and that one will have to include or import the other.
Thus, the following should hopefully solve your problem.
#RunWith(SpringRunner.class)
#ContextConfiguration
#TestPropertySource(properties = { "env = tomcat", "doNotifications = false" })
public class SpringWiringTest {
// ...
#Configuration
#ImportResource({"/testApplicationContext.xml", "/testResources.xml"})
static class Config {
// ...
}
}
In order to learn spring integration I've been attempting to create a simple, resilient log processor. I'm also wanting to stick with a java configuration approach.
I've been having a difficult time translating existing XML configuration, mostly due to being so new to spring in general.
In a question on the spring forums Gary Russell presented a similar solution to this using a publish-subscribe + JMS model with a simple XML config.
I've been attempting to translate his suggestion into a Java config, but am stuck. Namely I'm not sure of the proper entities to use for the outbound-channel-adapter, service-activators or how to set the order of messages properly.
Here is Gary's XML config:
<int-file:inbound-channel-adapter id="dispatcher"
directory="spool"
channel="fileChannel">
<int:poller fixed-delay="2000">
<int:transactional/>
</int:poller>
</int-file:inbound-channel-adapter>
<int:channel id="fileChannel" />
<int-file:file-to-string-transformer input-channel="fileChannel" output-channel="dispatchChannel" />
<int:publish-subscribe-channel id="dispatchChannel" />
<int-jms:outbound-channel-adapter id="dispatcherJms" channel="dispatchChannel" order="1"
connection-factory="connectionFactory"
destination="dispatcher.queue" />
<!-- If JMS Send was successful, remove the file (within the transaction)-->
<int:service-activator input-channel="dispatchChannel" order="2"
output-channel="nullChannel"
expression="headers.file_originalFile.delete()">
<bean id="transactionManager" class="org.springframework.jms.connection.JmsTransactionManager">
<property name="connectionFactory" ref="connectionFactory"/>
</bean>
UPDATE
Based on the comments below I've updated the java config.
However I'm still receiving errors and most likely am not understanding the flow and connections between the entities, but the original question has been answered.
#Bean
#Transactional
#InboundChannelAdapter(channel = "dispatchChannel", poller = #Poller(fixedDelay = "2000"))
public MessageSource<?> dispatcher() {
CompositeFileListFilter<File> filters = new CompositeFileListFilter<>();
filters.addFilter(new SimplePatternFileListFilter(sourceFilenamePattern));
//filters.addFilter(persistentFilter());
FileReadingMessageSource source = new FileReadingMessageSource();
source.setAutoCreateDirectory(true);
source.setDirectory(new File(sourceDirectory));
source.setFilter(filters);
return source;
}
#Bean
public MessageChannel fileChannel() {
return new DirectChannel();
}
#Bean
public PublishSubscribeChannel dispatchChannel() {
return new PublishSubscribeChannel();
}
#Autowired
JmsTemplate jmsTemplate;
#Autowired
ConnectionFactory connectionFactory;
#Bean
#Order(1)
#ServiceActivator(inputChannel = "dispatchChannel")
public MessageHandler dispatcherJmsOutboundChannelAdapter(Message<File> message) {
JmsSendingMessageHandler handler = new JmsSendingMessageHandler(jmsTemplate);
handler.setDestinationName("dispatcher.queue");
return handler;
}
#Bean
#Order(2)
#ServiceActivator(inputChannel = "dispatchChannel")
public void removeFile(Message<?> message) {
//message.getHeaders().get(FileHeaders.ORIGINAL_FILE, File.class).delete();
log.info("delete");
}
#Bean
public JmsTransactionManager transactionManager(ConnectionFactory connectionFactory) {
return new JmsTransactionManager(connectionFactory);
}
I'm using spring boot and several starter components, such as activemq. I've added the #Bean for JmsListenerContainerFactory and a #JmsListener, though I'm not sure those are truly necessary.
I couldn't get anything to run until adding #EnableJms to my configuration file as well as #Autowiring the jmstemplate and connectionfactory.
When running, the error I'm receiving now is:
org.springframework.beans.factory.NoSuchBeanDefinitionException:
No qualifying bean of type [org.springframework.messaging.Message] found for dependency
[org.springframework.messaging.Message<?>]:
expected at least 1 bean which qualifies as autowire candidate for this dependency.
Dependency annotations: {}
This one
<int:service-activator input-channel="dispatchChannel" order="2"
output-channel="nullChannel"
expression="headers.file_originalFile.delete()">
is pretty simple in Java:
#ServiceActivator(inputChannel = "dispatchChannel")
public void removeFile(Message<?> message) {
message.getHeaders().get(FileHeaders.ORIGINAL_FILE, File.class).delete();
}
and
<int-jms:outbound-channel-adapter>
is translated to this:
#Bean
#ServiceActivator(inputChannel = "dispatchChannel")
public MessageHandler dispatcherJmsOutboundChannelAdapter() {
JmsSendingMessageHandler handler =
new JmsSendingMessageHandler(new JmsTemplate(this.connectionFactory));
handler.setDestinationName("dispatcher.queue");
return handler;
}
Pay attention to this paragraph in the Reference Manual.
The last piece of jigsaw puzzle is FileWritingMessageHandler
#Bean
public FileWritingMessageHandler fileWritingMessageHandler() {
SpelExpressionParser parser = new SpelExpressionParser();
Expression expression = parser.parseExpression("headers.file_originalFile.delete()");
FileWritingMessageHandler fileWritingMessageHandler = new FileWritingMessageHandler(expression);
fileWritingMessageHandler.setOutputChannel(new NullChannel());
fileWritingMessageHandler.setDeleteSourceFiles(true);
return fileWritingMessageHandler;
}
I am trying to create a pollable message source and I have tried to do that by extending MessageProducerSupport, however I was able to see the message from receive method only once and was not successful in making it pollable. (The receive method is not getting called based on my polling schedule.)
My code snippet is as below:
#Component
public class MyAdapter extends MessageProducerSupport {
#Override
protected void doStart() {
receive();
}
public void receive() {
System.out.println("polled at : "+ new Date());
sendMessage(MessageBuilder.withPayload("Hello WOrld! "+ new Date()).build());
}
}
And my applicationContext is as below:
<context:component-scan base-package="com.mypackage" />
<context:annotation-config />
<bean id="pollerTaskExecutor" class="org.springframework.core.task.SyncTaskExecutor"/>
<int:inbound-channel-adapter ref="myAdapter" channel="output">
<int:poller task-executor="pollerTaskExecutor">
<int:interval-trigger interval="3000" fixed-rate="true" time-unit="MILLISECONDS"/>
</int:poller>
</int:inbound-channel-adapter>
I would like to know what am I missing to make this message source pollable.
You are right: the pollable message source is based . erm... on org.springframework.integration.core.MessageSource.
So, to make it working you just should move your MessageProducerSupport code to the AbstractMessageSource implementation.
See more info in the Reference Manual.
I need to write a simple HTTP client to make simple GET request and get JSON response using Spring integration.
Call fails with no message in exception: org.springframework.web.client.HttpServerErrorException: 500 Internal Server Error.
I tried debugging Spring code and did it successfully till I have source code, namely till
in the method AbstractMessageHandler.handleMessage(Message message)
abstract handleMessageInternal(Message message) has been called which threw
exception saying that request with
URL = http://example.com?q={q}&authKey={authKey}&rows={rows}&page={page}&filter={filter}
failed. URL looked exactly as I quoted, i.e. expressions have not been executed.
Payload in the message was always as it should be - instance if ZtInput with correct field values.
Could anyone give me an idea what to do?
Here is spring-integration-zt-context.xml:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:int="http://www.springframework.org/schema/integration"
xmlns:int-http="http://www.springframework.org/schema/integration/http"
xmlns:oxm="http://www.springframework.org/schema/oxm"
xsi:schemaLocation="http://www.springframework.org/schema/integration/http http://www.springframework.org/schema/integration/http/spring-integration-http-2.1.xsd
http://www.springframework.org/schema/integration http://www.springframework.org/schema/integration/spring-integration-3.0.xsd
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/oxm http://www.springframework.org/schema/oxm/spring-oxm-3.0.xsd">
<int:channel id="InChannelZt"></int:channel>
<int:channel id="OutChannelZt"></int:channel>
<!-- Gateway Start -->
<int:gateway id="ZtGateway" default-request-timeout="5000" default-reply-timeout="5000"
default-request-channel="InChannelZt" service-interface="com.example.service.ZtService">
<int:method name="getResults" request-channel="InChannelZt" reply-channel="OutChannelZt" />
</int:gateway>
<int-http:outbound-gateway id="locationZtGateway"
request-channel="InChannelZt"
reply-channel="OutChannelZt"
url="${zt_url}?q={q}&authKey={authKey}&rows={rows}&page={page}&filter={filter}"
http-method="GET"
reply-timeout='5000'
expected-response-type="com.example.vo.ZtResponse">
<int-http:uri-variable name="q" expression="payload.getQ()"/>
<int-http:uri-variable name="authKey" expression="payload.getAuthKey()"/>
<int-http:uri-variable name="rows" expression="payload.getRows()"/>
<int-http:uri-variable name="page" expression="payload.getPage()"/>
<int-http:uri-variable name="filter" expression="payload.getFilter()"/>
</int-http:outbound-gateway>
and two classes mentioned in it:
import com.xxxx.vo.ZtInput;
import com.xxxx.vo.ZtResponse;
public interface ZtService {
ZtResponse getSearchResults(ZtInput ztInput);
}
Payload:
public class ZtInput {
private String q; //=pink
private String authKey = "baef7f8e39c53f852c8a14b7f6018b58";
private String rows="20";
private String page="1";
private String filter = "";
public ZtInputVO() {
}
public String getQ() {
return q;
}
public void setQ(String q) {
this.q = q;
}
public String getAuthKey() {
return authKey;
}
public void setAuthKey(String authKey) {
this.authKey = authKey;
}
public String getRows() {
return rows;
}
public void setRows(String rows) {
this.rows = rows;
}
public String getPage() {
return page;
}
public void setPage(String page) {
this.page = page;
}
public String getFilter() {
return filter;
}
public void setFilter(String filter) {
this.filter = filter;
}
}
The URI in the exception is the original (unexpanded URI); the expansion is performed into a different variable. (We should/will change that to log the expanded URI). But the bottom line is your server didn't like the expanded URI and returned a 500 internal server error.
You can use a network/tcp monitor (eclipse has one built in or you can use wireshark) to examine the actual URL sent to the server. You can also look at the server logs, if enabled.
Or, in the debugger, step down to line 415 (in the current source code - version 4.0.4) and examine realUri.
EDIT: The exception now includes the expanded URI (currently available in 4.0.5.BUILD-SNAPSHOT and 4.1.0.BUILD-SNAPSHOT).
I am a newbie at WCF. I created a WCF restful service in VS2010 (WCF service appl). It was targeted for Framework 4.0. I hosted this service on local IIS with appl pool set for framework 4.0. When I call the appl methods from browser or fiddler, they work fine. Now, I created a client console based. When I call any method from client I get the following Communication Exception:
** remote server returned an unexpected response: (405) Method Not Allowed.**
Service Interface file:
namespace MyService
{
[ServiceContract]
public interface ITestService
{
[WebGet(UriTemplate = "GetDateTime")]
[OperationContract]
string GetDateTime();
[WebGet(UriTemplate = "GetName")]
[OperationContract]
string GetName();
}
}
Class that implements the above interface:
namespace MyService
{
public class TestService : ITestService
{
public string GetDateTime()
{
return DateTime.Now.ToString();
}
public string GetName()
{
return "MY name is KingKong";
}
}
}
Web.config file:
<system.serviceModel>
<services>
<service behaviorConfiguration="ServiceBehavior" name="MyService.TestService">
<endpoint address="" behaviorConfiguration="web" binding="webHttpBinding" bindingConfiguration="" contract="MyService.ITestService">
</endpoint>
</service>
</services>
<behaviors>
<endpointBehaviors>
<behavior name="web">
<webHttp />
</behavior>
</endpointBehaviors>
<serviceBehaviors>
<behavior name="ServiceBehavior">
<!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->
<serviceMetadata httpGetEnabled="true" />
<!-- To receive exception details in faults for debugging purposes, set the value below to true. Set to false before deployment to avoid disclosing exception information -->
<serviceDebug includeExceptionDetailInFaults="false" />
</behavior>
</serviceBehaviors>
</behaviors>
<serviceHostingEnvironment multipleSiteBindingsEnabled="true" />
TestService.svc
<%# ServiceHost Language="C#" Debug="true" Service="MyService.TestService" CodeBehind="TestService.svc.cs" %>
Client app.config:
<system.serviceModel>
<behaviors>
<endpointBehaviors>
<behavior name="">
<webHttp />
</behavior>
</endpointBehaviors>
</behaviors>
<client>
<endpoint address="http://localhost/BestService/TestService.svc"
binding="webHttpBinding" bindingConfiguration="" contract="MyService.ITestService"
name="MyClientConfig" kind="" endpointConfiguration="" />
</client>
</system.serviceModel>
Client program calling proxy class
static void Main(string[] args)
{
TestServiceClient proxy = null;
try
{
proxy = new TestServiceClient();
Console.WriteLine("Test 1: List all products");
string sdatetime = proxy.GetName();
Console.WriteLine("Datetime: {0}", sdatetime);
Console.WriteLine();
// Disconnect from the service
proxy.Close();
}
catch (CommunicationException cex)
{
if (cex.InnerException != null)
{
Console.WriteLine("{0}", cex.InnerException.Message);
}
else
{
Console.WriteLine("General exception: {0}", cex.Message);
}
}
catch (Exception e)
{
if (e.InnerException != null)
{
Console.WriteLine("{0}", e.InnerException.Message);
}
else
{
Console.WriteLine("General exception: {0}", e.Message);
}
}
Console.WriteLine("Press ENTER to finish");
Console.ReadLine();
}
I added a service reference to the application and the Reference.cs file has following partial code:
namespace MyClient.MyService {
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "4.0.0.0")]
[System.ServiceModel.ServiceContractAttribute(ConfigurationName="MyService.ITestService")]
public interface ITestService {
[System.ServiceModel.OperationContractAttribute(Action="http://tempuri.org/ITestService/GetDateTime", ReplyAction="http://tempuri.org/ITestService/GetDateTimeResponse")]
string GetDateTime();
[System.ServiceModel.OperationContractAttribute(Action="http://tempuri.org/ITestService/GetName", ReplyAction="http://tempuri.org/ITestService/GetNameResponse")]
string GetName();
}
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "4.0.0.0")]
public interface ITestServiceChannel : MyClient.MyService.ITestService, System.ServiceModel.IClientChannel {
}
[System.Diagnostics.DebuggerStepThroughAttribute()]
[System.CodeDom.Compiler.GeneratedCodeAttribute("System.ServiceModel", "4.0.0.0")]
public partial class TestServiceClient : System.ServiceModel.ClientBase<MyClient.MyService.ITestService>, MyClient.MyService.ITestService {
public TestServiceClient() {
}
public TestServiceClient(string endpointConfigurationName) :
base(endpointConfigurationName) {
}
public TestServiceClient(string endpointConfigurationName, string remoteAddress) :
base(endpointConfigurationName, remoteAddress) {
}
public TestServiceClient(string endpointConfigurationName, System.ServiceModel.EndpointAddress remoteAddress) :
base(endpointConfigurationName, remoteAddress) {
}
public TestServiceClient(System.ServiceModel.Channels.Binding binding, System.ServiceModel.EndpointAddress remoteAddress) :
base(binding, remoteAddress) {
}
public string GetDateTime() {
return base.Channel.GetDateTime();
}
public string GetName() {
return base.Channel.GetName();
}
}
}
Please help me as I have spent nearly 2 days trying to figure out the problem in the client
Thanks
VS2010 doesnt have the ability to generate a proxy for a RESTFUL service as it does for a SOAP based service. So the solution is write your own proxy class which inherits from the ClientBase class and use the Channel to call the web methods of the service.