package com.basicspring.basicapp;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
#Configuration
public class Config {
#Bean
public Dependency dependency(){
System.out.println("In dependency");
return new Dependency();
}
#Bean
public DependencyContainer dependencyContainer(){
System.out.println("In dependencyContainer");
dependency();
dependency();
dependency();
return new DependencyContainer(dependency());
}
}
Output:
Java HotSpot(TM) 64-Bit Server VM warning: Options -Xverify: none and -no verify were deprecated in JDK 13 and will likely be removed in a future release.
22:00:36.567 [main] DEBUG org.springframework.context.annotation.AnnotationConfigApplicationContext - Refreshing org.springframework.context.annotation.AnnotationConfigApplicationContext#7276c8cd
22:00:36.601 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
22:00:36.759 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.event.internalEventListenerProcessor'
22:00:36.762 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.event.internalEventListenerFactory'
22:00:36.765 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
22:00:36.766 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'org.springframework.context.annotation.internalCommonAnnotationProcessor'
22:00:36.778 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'config'
22:00:36.798 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'dependency'
In dependency
22:00:36.820 [main] DEBUG org.springframework.beans.factory.support.DefaultListableBeanFactory - Creating shared instance of singleton bean 'dependencyContainer'
In dependencyContainer
22:00:36.833 [main] DEBUG org.springframework.core.env.PropertySourcesPropertyResolver - Found key 'spring.liveBeansView.mbeanDomain' in PropertySource 'systemProperties' with value of type String
Process finished with exit code 0
Please look at the statements "In dependency" and "In dependencyContainer" in the output. Even after manually calling the dependency() method twice in dependencyContainer() method, it's not getting executed twice.
Default scope of a spring bean is singleton. Meaning there is only a single instance of a bean that is used throughout the application. If you use the #Configuration, calls to methods annotated with #Bean get routed to check if there is already an instance of the bean. If an instance is present that instance is returned without executing the function. If you remove the #Configuration annotation all the three calls get executed.
I have a package, class A in the package is annotated with #Configuration and ConditionalOnBean(B.class), and it is loaded by spring.factories;
In other package's spring bean xml, there is a factory Bean C, and it autowires a bean B;
When I started the server, I found bean B and C, but there is no bean A registered.
The debug log shows that bean A negative matched, but spring found Bean B, the log just like:
[DEBUG] 20180615 17:19:23.200 [localhost-startStop-1] ConfigurationClassBeanDefinitionReader - Registered bean definition for imported class 'A'
[DEBUG] 20180615 17:19:23.525 [localhost-startStop-1] ConfigurationClassEnhancer - Successfully enhanced A; enhanced class name is: A$$EnhancerBySpringCGLIB$$590152cc
[DEBUG] 20180615 17:19:23.525 [localhost-startStop-1] ConfigurationClassPostProcessor - Replacing bean definition 'A' existing class 'A' with enhanced class 'A$$EnhancerBySpringCGLIB$$590152cc'
[DEBUG] 20180615 17:19:23.586 [localhost-startStop-1] GenericScope - Generating bean factory id from names: [A]
[DEBUG] 20180615 17:20:11.825 [localhost-startStop-1] BeanNameUrlHandlerMapping - Rejected bean name 'A': no URL paths identified
[DEBUG] 20180615 17:20:13.574 [localhost-startStop-1] DefaultListableBeanFactory - Creating shared instance of singleton bean 'A'
[DEBUG] 20180615 17:20:13.574 [localhost-startStop-1] DefaultListableBeanFactory - Creating instance of bean 'A'
[DEBUG] 20180615 17:20:13.574 [localhost-startStop-1] DefaultListableBeanFactory - Eagerly caching bean 'A' to allow for resolving potential circular references
[DEBUG] 20180615 17:20:13.609 [localhost-startStop-1] DefaultListableBeanFactory - Finished creating instance of bean 'A'
report
A:
Did not match:
- #ConditionalOnBean (types: B; SearchStrategy: all) did not find any beans (OnBeanCondition)
Matched:
- #ConditionalOnBean (types: B; SearchStrategy: all) found bean 'defaultB' (OnBeanCondition)
I want to know:
the order springboot registers beans;
why the report show "did not find any bean" and "found bean" the same time?
I have a superclass which implements CommandMarker. Some children appears as an usable command, but this one does not.
The log says:
10:29:01.128 [main] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Finished creating instance of bean 'abortCommand'
....
10:29:01.230 [main] DEBUG o.s.b.f.s.DefaultListableBeanFactory - Returning cached instance of singleton bean 'abortCommand'
I found no errors while creating the bean, but when I try to use the command I get
Command 'abort' not found (for assistance press TAB)
I tagged the corresponding method with #CliCommand(value = "abort", help = "blah")
Seems that a method tagged with #CliCommand must be public to be visible for spring, tagging the class as #Component is not sufficient.
I am defining default-lazy-init="true" in the spring context file inside beans tag but when I start tomcat, I see my beans are getting instantiated. here is what it shows in log -
org.springframework.beans.factory.support.DefaultListableBeanFactory (DefaultListableBeanFactory.java:555) - Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory#ac6fb1: defining beans [dataSource,my other beans in app.......
Am I missing something ?
Even if a bean is declared to be lazy initialized, it will still be initialized if another bean depends on it.
I'm going to assume from your log, that the bean in question is dataSource. I will also assume you have other beans that depend on dataSource (otherwise it wouldn't be very useful). If the context initializes the other beans and finds that, for example, it needs to autowire the dataSource bean, it will have to first initialize it.
If you want full lazy initialization, you will have to make every bean in some object graph be lazily initialized.
I am trying to put log in spring standalone application.Here is my code
import org.apache.log4j.Logger;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.stereotype.Component;
#Component
public class Main {
static Logger log = Logger.getLogger(Main.class.getName());
public String id;
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public static void main(String[] args) {
// ApplicationContext context = new ClassPathXmlApplicationContext("spring.xml");
log.debug("Going to create HelloWord Obj");
//Main p = (Main) context.getBean("hello");
//System.out.println(p.getId());
log.debug("Exiting the program");
log.debug("Exiting the program1");
}
}
My log4j.properties is
log4j.rootLogger = DEBUG, FILE
# Define the file appender
log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=C://log.out
# Define the layout for file appender
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.conversionPattern=%m%n
In above code log is working correctly.It is not working when i remove the comment from Main Class. It is throwing some additional info in log.out file which is shown below.Let me know the reason why it is throwing like this..?
Adding [systemProperties] PropertySource with lowest search precedence
Adding [systemEnvironment] PropertySource with lowest search precedence
Initialized StandardEnvironment with PropertySources [systemProperties,systemEnvironment]
Initializing new StandardEnvironment
Adding [systemProperties] PropertySource with lowest search precedence
Adding [systemEnvironment] PropertySource with lowest search precedence
Initialized StandardEnvironment with PropertySources [systemProperties,systemEnvironment]
Initializing new StandardEnvironment
Adding [systemProperties] PropertySource with lowest search precedence
Adding [systemEnvironment] PropertySource with lowest search precedence
Initialized StandardEnvironment with PropertySources [systemProperties,systemEnvironment]
Using JAXP provider [com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl]
Loading schema mappings from [META-INF/spring.schemas]
Loaded schema mappings: {http://www.springframework.org/schema/util/spring-util.xsd=org/springframework/beans/factory/xml/spring-util-3.2.xsd, http://www.springframework.org/schema/jee/spring-jee-3.2.xsd=org/springframework/ejb/config/spring-jee-3.2.xsd, http://www.springframework.org/schema/task/spring-task.xsd=org/springframework/scheduling/config/spring-task-3.2.xsd, http://www.springframework.org/schema/beans/spring-beans-3.1.xsd=org/springframework/beans/factory/xml/spring-beans-3.1.xsd, http://www.springframework.org/schema/cache/spring-cache.xsd=org/springframework/cache/config/spring-cache-3.2.xsd, http://www.springframework.org/schema/task/spring-task-3.1.xsd=org/springframework/scheduling/config/spring-task-3.1.xsd, http://www.springframework.org/schema/tool/spring-tool-2.5.xsd=org/springframework/beans/factory/xml/spring-tool-2.5.xsd, http://www.springframework.org/schema/beans/spring-beans.xsd=org/springframework/beans/factory/xml/spring-beans-3.2.xsd, http://www.springframework.org/schema/jee/spring-jee-2.5.xsd=org/springframework/ejb/config/spring-jee-2.5.xsd, http://www.springframework.org/schema/tool/spring-tool-3.1.xsd=org/springframework/beans/factory/xml/spring-tool-3.1.xsd, http://www.springframework.org/schema/jee/spring-jee-3.1.xsd=org/springframework/ejb/config/spring-jee-3.1.xsd, http://www.springframework.org/schema/context/spring-context-3.2.xsd=org/springframework/context/config/spring-context-3.2.xsd, http://www.springframework.org/schema/beans/spring-beans-2.0.xsd=org/springframework/beans/factory/xml/spring-beans-2.0.xsd, http://www.springframework.org/schema/util/spring-util-3.2.xsd=org/springframework/beans/factory/xml/spring-util-3.2.xsd, http://www.springframework.org/schema/lang/spring-lang-3.2.xsd=org/springframework/scripting/config/spring-lang-3.2.xsd, http://www.springframework.org/schema/beans/spring-beans-3.0.xsd=org/springframework/beans/factory/xml/spring-beans-3.0.xsd, http://www.springframework.org/schema/cache/spring-cache-3.2.xsd=org/springframework/cache/config/spring-cache-3.2.xsd, http://www.springframework.org/schema/task/spring-task-3.0.xsd=org/springframework/scheduling/config/spring-task-3.0.xsd, http://www.springframework.org/schema/context/spring-context-2.5.xsd=org/springframework/context/config/spring-context-2.5.xsd, http://www.springframework.org/schema/tool/spring-tool-3.0.xsd=org/springframework/beans/factory/xml/spring-tool-3.0.xsd, http://www.springframework.org/schema/tool/spring-tool-2.0.xsd=org/springframework/beans/factory/xml/spring-tool-2.0.xsd, http://www.springframework.org/schema/util/spring-util-2.5.xsd=org/springframework/beans/factory/xml/spring-util-2.5.xsd, http://www.springframework.org/schema/lang/spring-lang.xsd=org/springframework/scripting/config/spring-lang-3.2.xsd, http://www.springframework.org/schema/lang/spring-lang-2.5.xsd=org/springframework/scripting/config/spring-lang-2.5.xsd, http://www.springframework.org/schema/jee/spring-jee-3.0.xsd=org/springframework/ejb/config/spring-jee-3.0.xsd, http://www.springframework.org/schema/jee/spring-jee-2.0.xsd=org/springframework/ejb/config/spring-jee-2.0.xsd, http://www.springframework.org/schema/context/spring-context-3.1.xsd=org/springframework/context/config/spring-context-3.1.xsd, http://www.springframework.org/schema/util/spring-util-3.1.xsd=org/springframework/beans/factory/xml/spring-util-3.1.xsd, http://www.springframework.org/schema/lang/spring-lang-3.1.xsd=org/springframework/scripting/config/spring-lang-3.1.xsd, http://www.springframework.org/schema/cache/spring-cache-3.1.xsd=org/springframework/cache/config/spring-cache-3.1.xsd, http://www.springframework.org/schema/context/spring-context.xsd=org/springframework/context/config/spring-context-3.2.xsd, http://www.springframework.org/schema/jee/spring-jee.xsd=org/springframework/ejb/config/spring-jee-3.2.xsd, http://www.springframework.org/schema/beans/spring-beans-3.2.xsd=org/springframework/beans/factory/xml/spring-beans-3.2.xsd, http://www.springframework.org/schema/task/spring-task-3.2.xsd=org/springframework/scheduling/config/spring-task-3.2.xsd, http://www.springframework.org/schema/context/spring-context-3.0.xsd=org/springframework/context/config/spring-context-3.0.xsd, http://www.springframework.org/schema/tool/spring-tool.xsd=org/springframework/beans/factory/xml/spring-tool-3.2.xsd, http://www.springframework.org/schema/util/spring-util-3.0.xsd=org/springframework/beans/factory/xml/spring-util-3.0.xsd, http://www.springframework.org/schema/lang/spring-lang-3.0.xsd=org/springframework/scripting/config/spring-lang-3.0.xsd, http://www.springframework.org/schema/util/spring-util-2.0.xsd=org/springframework/beans/factory/xml/spring-util-2.0.xsd, http://www.springframework.org/schema/lang/spring-lang-2.0.xsd=org/springframework/scripting/config/spring-lang-2.0.xsd, http://www.springframework.org/schema/tool/spring-tool-3.2.xsd=org/springframework/beans/factory/xml/spring-tool-3.2.xsd, http://www.springframework.org/schema/beans/spring-beans-2.5.xsd=org/springframework/beans/factory/xml/spring-beans-2.5.xsd}
Found XML schema [http://www.springframework.org/schema/beans/spring-beans-3.0.xsd] in classpath: org/springframework/beans/factory/xml/spring-beans-3.0.xsd
Found XML schema [http://www.springframework.org/schema/context/spring-context-3.0.xsd] in classpath: org/springframework/context/config/spring-context-3.0.xsd
Found XML schema [http://www.springframework.org/schema/tool/spring-tool-3.0.xsd] in classpath: org/springframework/beans/factory/xml/spring-tool-3.0.xsd
Loading bean definitions
Loaded NamespaceHandler mappings: {http://www.springframework.org/schema/p=org.springframework.beans.factory.xml.SimplePropertyNamespaceHandler, http://www.springframework.org/schema/lang=org.springframework.scripting.config.LangNamespaceHandler, http://www.springframework.org/schema/c=org.springframework.beans.factory.xml.SimpleConstructorNamespaceHandler, http://www.springframework.org/schema/jee=org.springframework.ejb.config.JeeNamespaceHandler, http://www.springframework.org/schema/util=org.springframework.beans.factory.xml.UtilNamespaceHandler, http://www.springframework.org/schema/cache=org.springframework.cache.config.CacheNamespaceHandler, http://www.springframework.org/schema/task=org.springframework.scheduling.config.TaskNamespaceHandler, http://www.springframework.org/schema/context=org.springframework.context.config.ContextNamespaceHandler}
Initializing new StandardEnvironment
Adding [systemProperties] PropertySource with lowest search precedence
Adding [systemEnvironment] PropertySource with lowest search precedence
Initialized StandardEnvironment with PropertySources [systemProperties,systemEnvironment]
Looking for matching resources in directory tree [E:\eclipse-workspace\composer_projects\Spring_Standalone\bin\com\controller]
Searching directory [E:\eclipse-workspace\composer_projects\Spring_Standalone\bin\com\controller] for files matching pattern [E:/eclipse-workspace/composer_projects/Spring_Standalone/bin/com/controller/**/*.class]
Resolved location pattern [classpath*:com/controller/**/*.class] to resources [file [E:\eclipse-workspace\composer_projects\Spring_Standalone\bin\com\controller\Main.class]]
Identified candidate component class: file [E:\eclipse-workspace\composer_projects\Spring_Standalone\bin\com\controller\Main.class]
Loaded 6 bean definitions from location pattern [spring.xml]
Bean factory for org.springframework.context.support.ClassPathXmlApplicationContext#27cd63: org.springframework.beans.factory.support.DefaultListableBeanFactory#1871f70: defining beans [main,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,hello]; root of factory hierarchy
Creating shared instance of singleton bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
Creating instance of bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
Eagerly caching bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor' to allow for resolving potential circular references
Finished creating instance of bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
Creating shared instance of singleton bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
Creating instance of bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
Eagerly caching bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor' to allow for resolving potential circular references
Finished creating instance of bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
Creating shared instance of singleton bean 'org.springframework.context.annotation.internalRequiredAnnotationProcessor'
Creating instance of bean 'org.springframework.context.annotation.internalRequiredAnnotationProcessor'
Eagerly caching bean 'org.springframework.context.annotation.internalRequiredAnnotationProcessor' to allow for resolving potential circular references
Finished creating instance of bean 'org.springframework.context.annotation.internalRequiredAnnotationProcessor'
Creating shared instance of singleton bean 'org.springframework.context.annotation.internalCommonAnnotationProcessor'
Creating instance of bean 'org.springframework.context.annotation.internalCommonAnnotationProcessor'
Eagerly caching bean 'org.springframework.context.annotation.internalCommonAnnotationProcessor' to allow for resolving potential circular references
Finished creating instance of bean 'org.springframework.context.annotation.internalCommonAnnotationProcessor'
Creating shared instance of singleton bean 'org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor'
Creating instance of bean 'org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor'
Eagerly caching bean 'org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor' to allow for resolving potential circular references
Finished creating instance of bean 'org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor'
Unable to locate MessageSource with name 'messageSource': using default [org.springframework.context.support.DelegatingMessageSource#653c7e]
Unable to locate ApplicationEventMulticaster with name 'applicationEventMulticaster': using default [org.springframework.context.event.SimpleApplicationEventMulticaster#1588db6]
Creating shared instance of singleton bean 'main'
Creating instance of bean 'main'
Eagerly caching bean 'main' to allow for resolving potential circular references
Finished creating instance of bean 'main'
Returning cached instance of singleton bean 'org.springframework.context.annotation.internalConfigurationAnnotationProcessor'
Returning cached instance of singleton bean 'org.springframework.context.annotation.internalAutowiredAnnotationProcessor'
Returning cached instance of singleton bean 'org.springframework.context.annotation.internalRequiredAnnotationProcessor'
Returning cached instance of singleton bean 'org.springframework.context.annotation.internalCommonAnnotationProcessor'
Creating shared instance of singleton bean 'hello'
Creating instance of bean 'hello'
Eagerly caching bean 'hello' to allow for resolving potential circular references
Finished creating instance of bean 'hello'
Returning cached instance of singleton bean 'org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor'
Unable to locate LifecycleProcessor with name 'lifecycleProcessor': using default [org.springframework.context.support.DefaultLifecycleProcessor#10ddb86]
Returning cached instance of singleton bean 'lifecycleProcessor'
Searching for key 'spring.liveBeansView.mbeanDomain' in [systemProperties]
Searching for key 'spring.liveBeansView.mbeanDomain' in [systemEnvironment]
Could not find key 'spring.liveBeansView.mbeanDomain' in any property source. Returning [null]
Going to create HelloWord Obj
Returning cached instance of singleton bean 'hello'
Exiting the program
Exiting the program1
The log is still working.. At the bottom you can see
Exiting the program
Exiting the program1
there is just additional log from the Spring framework. When the spring container is initialised it will log information of its own, as you see here.
I cant actually see any problem here.
If you want to remove the spring logging you can specify the logging level for a particular package like this in the log4j.properties:
log4j.logger.org.springframework=WARN
Should only show warnings and errors.
I would change your conversionPattern to something like this also: %d{ABSOLUTE} %5p %c{1}:%L - %m%n
This will give alot more information and you will be able to see what package is logging what