Notes by Fang
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Created by Fang on January 04, 2013 14:35:14 Last update: January 04, 2013 14:35:41
You can use the runOrder parameter to control the test execution order for Maven surefire tests:
<build> <plugins> <plugin> ...Other options are: Option Meaning alphabetical Alphabetical reversealphabetical Reverse Alphabetical random Randomized hourly alphabetical on even hours, reverse alphabetical on odd hours failedfirst Failed first will run tests that failed on previous run first, as well as new tests for this run. balanced Balanced is only relevant with parallel=classes, and will try to optimize the run-order of the tests to make all tests complete at the same time, reducing the overall execution time. filesystem This is the default. I guess this is the order returned by the file system: uncontrolled but deterministic.
Created by Fang on January 04, 2013 14:16:58 Last update: January 04, 2013 14:16:58
Junit does not support specifying execution order of tests until 4.11. The methods were simply invoked in the order returned by the reflection API. So, the tests are executed in a unspecified but deterministic order, i.e., you have no control over the order of execution, but if you repeat the tests, they are run in the same sequence each time. For version 4.11, you can specify the order with the FixMethodOrder annotation:
import org.junit.runners.MethodSorters; imp...From the release notes : Test execution order By design, JUnit does not specify the execution order of test method invocations. Until now, the methods were simply invoked in the order returned by the reflection API. However, using the JVM order is unwise since the Java platform does not specify...
Created by Fang on January 04, 2013 08:00:37 Last update: January 04, 2013 08:00:37
This is a Maven POM that prints out some built-in project properties:
$ mvn validate [INFO] Scanning for projects.....
Created by Fang on July 25, 2012 12:52:40 Last update: September 14, 2012 13:37:57
Summarized from official JAX-WS documentation : Sending and Receiving SOAP Headers To send a SOAP header:
HelloService helloService = new HelloService(); ...To receive a SOAP header:
List<Header> inboundHeaders = bp.getInboundHeaders...Message logging On the client side, set system property:
com.sun.xml.ws.transport.http.client.HttpTransport...On the server side, set system property:
com.sun.xml.ws.transport.http.HttpAdapter.dump=tru...Propagation of Server-side Stacktrace Propagation of Stack trace is on by default. The whole stacktrace (including nested exceptions) is propagated in the SOAP Fault and the complete exception stacktrace is visible to the client as cause of SOAPFaultException . To turn off stack trace propagation, set this system property on the server:
com.sun.xml.ws.fault.SOAPFaultBuilder.disableCaptu...Update: At least on the client side, the property name has been changed to:
com.sun.xml.internal.ws.transport.http.client.Http...The messages are dumped to stdout . For...
Created by Fang on May 03, 2012 15:07:17 Last update: May 03, 2012 15:07:52
Scaling an image with default Java API loses quality (horribly!):
public static BufferedImage resizeImage(Buffer...The imgscalr library does the job beautifully. And its' very easy to do:
// import org.imgscalr.Scalr; public static...To import the library in Maven:
<dependency> <groupId>org.imgscalr</groupId> ...
Created by Fang on March 30, 2012 12:15:49 Last update: March 30, 2012 12:15:49
1. mvc:default-servlet-handler Configures a handler for serving static resources by forwarding to the Servlet container's default Servlet. Use of this handler allows using a "/" mapping with the DispatcherServlet while still utilizing the Servlet container to serve static resources. HandlerMapping: org.springframework.web.servlet.handler.SimpleUrlHandlerMapping Handler: org.springframework.web.servlet.handler.SimpleUrlHandlerMapping Attribute Description default-servlet-name The name of the default Servlet to forward to for static resource requests. The handler will try to auto-detect the container's default Servlet at startup time using a list of known names. If the default Servlet cannot be detected because of using an unknown container or because it has been manually configured, the servlet name must be set explicitly. 2. mvc:view-controller Defines a simple Controller that selects a view to render the response. HandlerMapping: org.springframework.web.servlet.handler.SimpleUrlHandlerMapping Handler: org.springframework.web.servlet.mvc.ParameterizableViewController Attribute Description...
Created by Fang on March 30, 2012 10:23:21 Last update: March 30, 2012 10:23:21
These bean types are essential for the Spring MVC framework. I copied them here from the Spring Documentation for quick reference. Bean type Explanation HandlerMapping Maps incoming requests to handlers and a list of pre- and post-processors (handler interceptors) based on some criteria the details of which vary by HandlerMapping implementation. The most popular implementation supports annotated controllers but other implementations exists as well. HandlerAdapter Helps the DispatcherServlet to invoke a handler mapped to a request regardless of the handler is actually invoked. For example, invoking an annotated controller requires resolving various annotations. Thus the main purpose of a HandlerAdapter is to shield the DispatcherServlet from such details. HandlerExceptionResolver Maps exceptions to views also allowing for more complex exception handling code. ViewResolver Resolves logical String-based...
Created by Fang on March 06, 2012 12:24:53 Last update: March 06, 2012 12:24:53
Validation groups can be used to control which rules validation rules to run. A validation group can be identified by any Java interface (not class!). Multiple validation groups may be specified when validating. In this example, I added a validation group named MyValidationGroup ( src/main/java/com/example/MyValidationGroup.java in Maven project):
package com.example; public interface MyVal...and added a @Size rule for a person's name, because my database can only store up to 15 characters for a person's name:
package com.example; import javax.validatio...Now validate Person with a JUnit test ( src/test/java/com/example/TestPersonWithGroup.java in Maven project):
package com.example; import java.util.Set; ...Test with " mvn clean test ". The rules where groups is not specified, which belong to the javax.validation.groups.Default group, are not executed with these tests.
Created by Fang on March 02, 2012 13:23:35 Last update: March 02, 2012 13:23:35
The landing page after login can be configured with the default-target-url attribute of form-login . If a user was redirected to the login form after requesting a restricted URL, she's redirected to the original requested page after successful login. An easy configuration looks like this:
<beans:beans xmlns="http://www.springframework.org...But there are times that you want to do more initialization after login (such as loading user data), or apply more complex logic before redirecting. This is where the authentication-success-handler-ref attribute comes into play. You create a class that implements org.springframework.security.web.authentication.AuthenticationSuccessHandler and use that as the authentication-success-handler-ref :
<http entry-point-ref="authProcessFilterEn...This is a skeleton implementation:
public class MyAuthenticationSuccessHandler implem...
Created by Fang on February 21, 2012 20:54:23 Last update: February 21, 2012 20:57:57
Tomcat gzip compression filter can be turned on with " compression=on " in server.xml :
<Connector port="8080" protocol="HTTP/1.1" ...The default compressed MIME types are: text/html,text/xml,text/plain . It would be nice to add other types:
<Connector port="8080" protocol="HTT...