MyBatis Hot Load Mapper.xml

Development, write MyBatis Mapper.xml file, each time the SQL needs to restart the service, feel very troublesome, so try to write a mybatis mapper.xml hot load.

Can reload MyBatis after modifying Mapper.xml, can use it when developing.

Spring Configuration:

<id= "Mybatismapperdynamicloader"  class= " Com.teststartup.MybatisMapperDynamicLoader "/>

Java code:

Importjava.io.IOException;ImportJava.lang.reflect.Field;ImportJava.util.HashMap;ImportJava.util.Map;ImportJava.util.Set;ImportJava.util.Timer;ImportJava.util.TimerTask;ImportOrg.apache.ibatis.builder.xml.XMLMapperBuilder;ImportOrg.apache.ibatis.executor.ErrorContext;Importorg.apache.ibatis.session.Configuration;Importorg.apache.ibatis.session.SqlSessionFactory;Importorg.springframework.beans.BeansException;ImportOrg.springframework.beans.factory.InitializingBean;ImportOrg.springframework.context.ApplicationContext;ImportOrg.springframework.context.ApplicationContextAware;ImportOrg.springframework.context.ConfigurableApplicationContext;Importorg.springframework.core.NestedIOException;ImportOrg.springframework.core.io.Resource;ImportOrg.springframework.core.io.support.PathMatchingResourcePatternResolver;ImportOrg.springframework.core.io.support.ResourcePatternResolver; Public classMybatismapperdynamicloaderImplementsInitializingbean, Applicationcontextaware {Private Finalhashmap<string, string> mappers =NewHashmap<string, string>(); Private volatileConfigurableapplicationcontext context =NULL; Private volatileScanner Scanner =NULL; @Override Public voidSetapplicationcontext (ApplicationContext ApplicationContext)throwsbeansexception { This. Context =(Configurableapplicationcontext) ApplicationContext; } @Override Public voidAfterpropertiesset ()throwsException {Try{Scanner=NewScanner (); NewTimer (true). Schedule (NewTimerTask () { Public voidrun () {Try {                        if(scanner.ischanged ()) {System.out.println ("Load Mapper.xml");                        Scanner.reloadxml (); }                    } Catch(Exception e) {e.printstacktrace (); }                }            }, 10 * 1000, 5 * 1000); } Catch(Exception E1) {e1.printstacktrace (); }} @SuppressWarnings ("Unchecked")    classScanner {Private Static FinalString Xml_resource_pattern = resourcepatternresolver.classpath_all_url_prefix + "**/*sql.xml"; Private FinalResourcepatternresolver Resourcepatternresolver =NewPathmatchingresourcepatternresolver ();  PublicScanner ()throwsIOException {resource[] resources=FindResource (); if(Resources! =NULL) {                 for(Resource resource:resources) {String key=Resource.geturi (). toString (); String value=GETMD (Resource);                Mappers.put (key, value); }            }        }         Public voidReloadxml ()throwsException {sqlsessionfactory Factory= Context.getbean (sqlsessionfactory.class); Configuration Configuration=factory.getconfiguration ();            Removeconfig (configuration);  for(Resource Resource:findresource ()) {Try{xmlmapperbuilder Xmlmapperbuilder=NewXmlmapperbuilder (Resource.getinputstream (), Configuration, resource.tostring (), configuration.getsqlfragments                    ());                Xmlmapperbuilder.parse (); } finally{errorcontext.instance (). reset (); }            }        }        Private voidRemoveconfig (Configuration configuration)throwsException {Class<?> Classconfig =Configuration.getclass (); Clearmap (classconfig, configuration,"Mappedstatements"); Clearmap (classconfig, configuration,"Caches"); Clearmap (classconfig, configuration,"Resultmaps"); Clearmap (classconfig, configuration,"Parametermaps"); Clearmap (classconfig, configuration,"Keygenerators"); Clearmap (classconfig, configuration,"Sqlfragments"); Clearset (classconfig, configuration,"Loadedresources"); }        Private voidClearmap (class<?> classconfig, configuration configuration, String fieldName)throwsException {Field field=Classconfig.getdeclaredfield (fieldName); Field.setaccessible (true); ((Map) field.get (configuration). Clear (); }        Private voidClearset (class<?> classconfig, configuration configuration, String fieldName)throwsException {Field field=Classconfig.getdeclaredfield (fieldName); Field.setaccessible (true); ( Set) field.get (configuration). Clear (); }         Public BooleanIschanged ()throwsIOException {BooleanIschanged =false;  for(Resource Resource:findresource ()) {String key=Resource.geturi (). toString (); String value=GETMD (Resource); if(!value.equals (Mappers.get (key))) {ischanged=true;                Mappers.put (key, value); }            }            returnischanged; }        PrivateResource[] FindResource ()throwsIOException {returnresourcepatternresolver.getresources (Xml_resource_pattern); }        PrivateString GETMD (Resource Resource)throwsIOException {return NewStringBuilder (). Append (Resource.contentlength ()). Append ("-"). Append (Resource.lastmodified ()). ToString (); }    }}

MyBatis Hot Load Mapper.xml