{"id":4633,"date":"2014-03-30T14:10:45","date_gmt":"2014-03-30T14:10:45","guid":{"rendered":"https:\/\/unknownerror.org\/index.php\/2014\/03\/30\/problem-about-autowired-collection-of-common-programming-errors\/"},"modified":"2014-03-30T14:10:45","modified_gmt":"2014-03-30T14:10:45","slug":"problem-about-autowired-collection-of-common-programming-errors","status":"publish","type":"post","link":"https:\/\/unknownerror.org\/index.php\/2014\/03\/30\/problem-about-autowired-collection-of-common-programming-errors\/","title":{"rendered":"problem about autowired-Collection of common programming errors"},"content":{"rendered":"<ul>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/652a20462ab93c80f1b0f59e5298ee48?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nuser1051218<br \/>\njava spring autowired<br \/>\nIf I have two classes like: Class A {public String importantValue = &#8220;stringvalue&#8221;;@Autowirepublic B b; }@Component @Scope(&#8220;prototype&#8221;); Class B {\/\/ This should be set automatically\/\/ from IOC Container upon injection.public String importantValueFromA; }Is this even possible? As soon as B class has been injected to A it should automatically set the value in B.<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/48a5f4e45308362d9c0d18de8932010c?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nmjaskowski<br \/>\nspring ioc-container autowired<br \/>\nOn Spring @Autowired usage question most of the people answer they prefer not using configuration files, if possible. It seems like a good answer at the first glance.However, once you have quite a big application which uses Spring IoC and autowires all the stuff using annotations @Autowired, @Service, etc. you must hit this problem: you no longer are able to keep track of your bean dependencies. How do you deal with that? Using SpringSource Tool Suite one can create graphs of dependencies on the<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/a0a3a4200899708103f7430d87d56e24?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nTomasz Nurkiewicz<br \/>\njava spring inversion-of-control autowired<br \/>\nLet&#8217;s assume I have an annotated bean property setter like this:public class Foo {&#8230;@Autowired public void setBar(Bar bar) {&#8230; }The Springframework will lookup the matching Bar property as usual. However, I&#8217;d like to intercept the default bean resolving process and add a little bit of &#8220;magic&#8221; myself. I&#8217;d like to introduce a resolver like this:public interface SomeResolverInterface&lt;T&gt; {public T resolve(Class&lt;T&gt; beanClass); }public class BarResolver implements SomeResolverInterface&amp;l<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/4ab09341a65640abd50e96d5384eb423?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nGrant Cermak<br \/>\nspring obfuscation proguard autowired<br \/>\nI have a library Common.License which I am obfuscating with Proguard: &lt;plugin&gt;&lt;groupId&gt;com.pyx4me&lt;\/groupId&gt;&lt;artifactId&gt;proguard-maven-plugin&lt;\/artifactId&gt;&lt;executions&gt;&lt;execution&gt;&lt;phase&gt;package&lt;\/phase&gt;&lt;goals&gt;&lt;goal&gt;proguard&lt;\/goal&gt;&lt;\/goals&gt;&lt;\/execution&gt;&lt;\/executions&gt;&lt;configuration&gt;&lt;obfuscate&gt;true&lt;\/obfuscate&gt;&lt;options&gt;&lt;option&gt;-dontoptimize&lt;\/option&gt;&lt;option&gt;-renamesourcefileat<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/8ec7cdaaf6fd5ee313cb6228f08cd67c?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nfastcodejava<br \/>\njava spring dependency-injection annotations autowired<br \/>\nWhich annotation, @Resource (jsr250) or @Autowired (Spring specific) should I be using when using DI?I have successfully used both in the past, @Resource(name=&#8221;blah&#8221;) and @Autowired @Qualifier(&#8220;blah&#8221;)my instinct is to stick with the @Resource tag since it&#8217;s been ratified by the jsr people&#8230; anyone have strong thoughts on this?(apologies if this question has been asked before, I couldn&#8217;t find it&#8230;)<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/8de038497b6b8b67bc82eeaaef1a0b6b?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nBozho<br \/>\njava spring autowired<br \/>\nIs there any downside to putting a ton of @Autowired beans in a super class which don&#8217;t get used in that class but instead are used in the subclasses that extend the super class?<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/2abbbc6ae4fcfd3a265c9cf945ed5c86?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nVikdor<br \/>\nspring autowired<br \/>\nI&#8217;ve started to build some kind of a CMS and I&#8217;m stuck over one idea. The description is:I have standard MVC Controller (Home) in which I&#8217;m downoading modules settings which will be set in this Controller.The response is, that I have to implement module with name &#8220;HPModule&#8221;.So I&#8217;m trying to load this module by Class.forName(&#8220;com.app.something.HPModule&#8221;); and then call method init();My HPModule is:public class HPModule {@Resource(name = &#8220;hpModuleService&#8221;)private HPModuleService hpModuleService;pu<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/7be49613ac7fe63e7931e6f859c01d8e?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nRythmic<br \/>\njava spring autowired<br \/>\nI realize this should be really basic but I haven&#8217;t found a second step example after HelloworldSo what I have is:spring config xml called spring-beans.xml:&lt;beans xmlns=&#8221;http:\/\/www.springframework.org\/schema\/beans&#8221;xmlns:xsi=&#8221;http:\/\/www.w3.org\/2001\/XMLSchema-instance&#8221;xmlns:context=&#8221;http:\/\/www.springframework.org\/schema\/context&#8221;xsi:schemaLocation=&#8221;http:\/\/www.springframework.org\/schema\/beans http:\/\/www.springframework.org\/schema\/beans\/spring-beans-2.5.xsd http:\/\/www.springframework.org\/schema\/co<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/5bf1f11c3493fb7dc5b4045c90a80403?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nAndy White<br \/>\njava spring autowired<br \/>\nWhat are the pros and cons of using @Autowired in a class that will be wired up by Spring? Just to clarify, I&#8217;m talking specifically about the @Autowired annotation, not auto-wiring in XML.I probably just don&#8217;t understand it, but to me it almost seems like an anti-pattern &#8211; your classes start to become aware that they are tied to a DI framework, rather than just being POJOs. Maybe I&#8217;m a glutton for punishment, but I like having the external XML config for beans, and I like to have explicit wir<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/f80c32df1d3e07e85e4806dcaeb01d58?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nAlexandr<br \/>\njava spring spring-mvc configuration autowired<br \/>\nWhen request is processed by spring controller, the service is not wired:@Controller @RequestMapping(value = &#8220;\/login&#8221;) public class LoginController {@Injectprivate AccountService accountService;@RequestMapping(method = RequestMethod.POST)public String handleLogin(HttpServletRequest request, HttpSession session){try {&#8230;\/\/Next line throws NullPointerException, this.accountService is nullAccount account = this.accountService.login(username, password);} catch (RuntimeException e) {request.setAttrib<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/d5f91983a9d9cfb69981b6108a63b412?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nskaffman<br \/>\njava unit-testing spring autowired<br \/>\nI am trying to speed up the Integration tests in our environment. All our classes are autowired. In our applicationContext.xml file we have defined the following:&lt;context:annotation-config\/&gt; &lt;context:component-scan base-package=&#8221;com.mycompany.framework&#8221;\/&gt; &lt;context:component-scan base-package=&#8221;com.mycompany.service&#8221;\/&gt; &#8230;additional directoriesI have noticed that Spring is scanning all directories indicated above and then iterates over each bean and caches the properties of eac<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/2f2ed5077e6a2df78d9b2201590dcd1a?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nJesse<br \/>\njava spring autowired<br \/>\nI defined a bean in spring context file &#8216;applicationContext.xml&#8217; like below :&lt;bean id=&#8221;daoBean&#8221; class=&#8221;org.mockito.Mockito&#8221; factory-method=&#8221;mock&#8221;&gt;&lt;constructor-arg value=&#8221;com.xxx.DAOImpl&#8221; \/&gt; &lt;\/bean&gt; In my service class (ServiceImpl), I am using this bean like below:@Component(&#8220;serviceImpl&#8221;)public class ServiceImpl{\/\/ other code here@Autowiredprivate transient DAOImpl daoBean;\/\/ other code here}My service class is being accessed from my JUnit test class.@RunWith(SpringJUnit4Class<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/7d806e8b7ff3d12ef606bf322d72f78e?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nJohan Sj\u00f6berg<br \/>\njava spring aspectj spring-aop autowired<br \/>\nHow can I get an already existing object spring managed? I would like to hook it up to Springs AoP capabilities using aspectj. I know this to be a challenge since Spring AoP uses dynamic proxies which probably are created along with the object. Why do I need this?I have a third-party class which takes a constructor argument which is only known in runtime, hence it seems I cannot add it to my applicationContext or use springs FactoryBean interface for construction. Is there any other way?I&#8217;ve al<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/261ed16670fbd654aa0f53497e6dd994?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nRandbedingung<br \/>\nspring javabeans autowired<br \/>\nI have following class:@Component(&#8220;persistenceJPAConfig&#8221;) public class JPAPersistenceConfig {&#8230;}Using Spring I am able to &#8220;inject&#8221; the class by adding a method with @Autowired-annotation in my target Class where I want to use JPAPersistenceConfig &#8211; Class. I works fine, the class itself is fine.The Problem is that I have to create a Class at runtime (writing source code and compile it) that has to use the bean as well.I added the autowired-methods too, but it keeps to be null.@org.springframewor<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/36ac1f2f53d26b4a251e4f001c810583?s=32&amp;d=identicon&amp;r=PG&amp;f=1\" \/><br \/>\nTunguska<br \/>\njava spring spring-mvc javabeans autowired<br \/>\nI try to initialize my Hibernate DAO instances dynamically.What is given:Generic DAO (GenericDaoImpl&lt;T,PK extends Serializable&gt;) DAO Factory, which should create a Generic DAO instance for each model class in package (I try something with reflection) Beans seem to be created, but as soon as I want to autowire I receive a Exception Spring &#8220;3.2.4.RELEASE&#8221; EnvironmentGenericDaoFactory@Configurable public class GenericDaoFactory {@Autowired private AutowireCapableBeanFactory beanFactory;@Autow<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/667ce1ead15d50e1429c5a259bb22741?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nr15habh<br \/>\njava spring autowired<br \/>\nI have a class B which implements W interface. It has a default implementation of W&#8217;s method. class C and D override default implementation for which they need a service whose bean is instantiated by spring. String a and b comes from user and hence there is no way I can create a bean of B\/C\/D in advance. So I have a factory which creates a new object based on user parameters (it will create B\/C\/D based on parameters). Is there any clean way I can use service beans(aa\/bb\/cc\/dd etc.) from inside<\/li>\n<li><img decoding=\"async\" src=\"http:\/\/www.gravatar.com\/avatar\/92e5c51218f00220e0362c47b2a94b9a?s=32&amp;d=identicon&amp;r=PG\" \/><br \/>\nStefan Kendall<br \/>\ntomcat grails groovy junit autowired<br \/>\nI have a non-service class which is defined as such:class A{B bA( B b ){ this.b = b } }where B is a grails service. In my unit tests, I tried this:A a = new A( new B() );For some reason, however, b never gets set, and the variable b [local, the argument to the mehod] isn&#8217;t even visible in Intelli-J&#8217;s debugger when running the test. That is, I can rename the argument to service, and the debugger shows it as undefined.When I try to start a server, I get Initialization of bean failed; nested except<\/li>\n<\/ul>\n<p>Web site is in building<\/p>\n","protected":false},"excerpt":{"rendered":"<p>user1051218 java spring autowired If I have two classes like: Class A {public String importantValue = &#8220;stringvalue&#8221;;@Autowirepublic B b; }@Component @Scope(&#8220;prototype&#8221;); Class B {\/\/ This should be set automatically\/\/ from IOC Container upon injection.public String importantValueFromA; }Is this even possible? As soon as B class has been injected to A it should automatically set the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-4633","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/4633","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/comments?post=4633"}],"version-history":[{"count":0,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/posts\/4633\/revisions"}],"wp:attachment":[{"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/media?parent=4633"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/categories?post=4633"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unknownerror.org\/index.php\/wp-json\/wp\/v2\/tags?post=4633"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}