Implementation of spring custom annotation scanning

Goal: Implement custom Spring Auto-scan annotations. Provide technical support for late implementation of distributed service Framework automatic annotations

Technical analysis: Make spring parse labels by configuring component scan labels.

1. Jewelscanbeandefaultparser.java

 Public classJewelscanbeandefaultparser implements Beandefinitionparser {Private StaticFinal String Resource_pattern ="/**/*.class"; PrivateResourcepatternresolver Resourcepatternresolver =NewPathmatchingresourcepatternresolver ();  PublicBeandefinition Parse (element element, ParserContext parsercontext) {String basepackage= Element.getattribute ("Base-package"); if(Stringutils.hastext (basepackage)) {Try{String pattern= Resourcepatternresolver.classpath_all_url_prefix +Classutils.convertclassnametoresourcepath (basepackage)+Resource_pattern; Resource[] Resources=resourcepatternresolver.getresources (pattern); Metadatareaderfactory readerfactory=NewCachingmetadatareaderfactory ( This. Resourcepatternresolver);  for(Resource resource:resources) {if(Resource.isreadable ()) {Metadatareader Reader=Readerfactory.getmetadatareader (Resource); String ClassName=reader.getclassmetadata (). GetClassName (); Class<?> Clazz =Class.forName (className); Jewelservice Jewelservice= Clazz.getannotation (Jewelservice.class); if(NULL!=Jewelservice)                        {annotationbeandefinitionloader.load (Jewelservice, Clazz, ParserContext); } jewelremote jewelremote= Clazz.getannotation (jewelremote.class); if(NULL!=jewelremote)                        {annotationbeandefinitionloader.load (Jewelremote, Clazz, ParserContext); }                    }                }            } Catch(IOException e) {e.printstacktrace (); } Catch(ClassNotFoundException e) {//TODO auto-generated Catch blockE.printstacktrace (); }        }        return NULL; }}

2. Annotation interface Definition

Jewelremote.java

@Documented @target (Elementtype.type) @Retention (retentionpolicy.runtime) public @interface jewelremote {public String name () default "";p ublic string version () default "v_0.0.1";p ublic string Registry () default "registry";}

Jewelservice.java

@Documented @target (Elementtype.type) @Retention (retentionpolicy.runtime) public @interface Jewelservice {public String name () default "";p ublic string version () default "v_0.0.1";p ublic string Registry () default "registry";}

Implementation of spring custom annotation scanning