Detailed introduction of shiro source code

(1)//1. Get the SecurityManager factory. Use the Ini configuration file to initialize the SecurityManager.

##Factory factory = new IniSecurityManagerFactory(" classpath:shiro.ini")

2. The class structure of the factory class is:

(3)The abstractFactory class mainly sets whether it is a singleton

(4)iniFactorySupport is an object created by supporting ini settings

(5)iniSecuritymanagerFactory is the implementation class of securityManager created in ini method

(2)//2. Get the SecurityManager instance and bind it to SecurityUtils

org.apache.shiro.mgt.SecurityManagersecurityManager = factory.getInstance();

SecurityUtils.setSecurityManager(securityManager);

(1) Create a Securitymanager object through the created Ini object

1  IniSecurityManagerFactory类：2      creatSecuritymanager(ini){3      SecurityManager securityManager = createSecurityManager(ini);4      return securityManager;5  }

(2) Create a Securitymanager through the created Ini object Object

 1 private SecurityManager createSecurityManager(Ini ini) { 2 //null 3 Ini.Section mainSection = ini.getSection(MAIN_SECTION_NAME); 4 if (CollectionUtils.isEmpty(mainSection)) { 5  6 //try the default: null 7 mainSection = ini.getSection(Ini.DEFAULT_SECTION_NAME); 8 } 9  return createSecurityManager(ini, mainSection);10  }

(3) Create Securitymanager

through the ini object and main module mainSession

 1 private SecurityManager createSecurityManager(Ini ini, Ini.Section mainSection) { 2 //{securityManager=DefaultSecurityManager,iniRealm=IniRealm}   3 Map defaults = createDefaults(ini, mainSection); 4 Map objects = buildInstances(mainSection, defaults); 5  6 SecurityManager securityManager = getSecurityManagerBean(); 7 boolean autoApplyRealms = isAutoApplyRealms(securityManager); 8 if (autoApplyRealms) { 9 //realms and realm factory might have been created - pull them out first  so we can initialize the securityManager:10  Collection realms = getRealms(objects);11  //set them on the SecurityManager12  if (!CollectionUtils.isEmpty(realms)) {13          applyRealmsToSecurityManager(realms, securityManager);14            }15         }16        return securityManager;17     }

(4) Set the association between objects through mainSession and the default object object

 1 private Map buildInstances(Ini.Section section, Map defaults) { 2      this.builder = new ReflectionBuilder(defaults); 3      return this.builder.buildObjects(section); 4      ｝ 5 //类ReflectionBuilder 6 //通过mainSection创建对象并关联 7  public Map buildObjects(Map kvPairs) { 8   ..... 9  LifecycleUtils.init(objects.values());10 ｝

(5) Because IniRealm implements Initializable, initialize the IniRealm object

 1 //类IniRealm 2 private void processDefinitions(Ini ini) { 3  Ini.Section usersSection = ini.getSection(USERS_SECTION_NAME); 4  processUserDefinitions(usersSection); 5 } 6 //通过userSection解析user模块 7  protected void processUserDefinitions(Map userDefs) { 8       for (String username : userDefs.keySet()) { 9          ........10       account = new SimpleAccount(username, password, getName());11       add(account);12         ........13        }14  ｝15 protected void add(SimpleAccount account) {16    String username = getUsername(account);17    USERS_LOCK.writeLock().lock();18    try {19     this.users.put(username, account);20    }finally {21     USERS_LOCK.writeLock().unlock();22 }

The class structure of IniRealm is:

The structure of simpleAccount is:

##At this point, the object association is created. The initialization of IniRealm is completed! Next, look at the structure diagram of DefaultSecurityManager:

##(7) Set the realm attribute of DefaultSecurityManager:

1  applyRealmsToSecurityManager(realms, securityManager)｛2     ((RealmSecurityManager) securityManager).setRealms(realms);3 ｝4 //在类RealmSecurityManager中5 public void setRealms(Collection realms) {6    this.realms = realms;7    afterRealmsSet();8 ｝

Note:

afterRealmsSet(); is mainly used to set the realm attributes of authenticator and authorizer:

At this point, the properties of DefaultSecurityManager are set Complete and return the DefaultSecurityManager object

//3. Obtain the Subject and create the username/password authentication Token (i.e. user identity/credential)

Subject subject = SecurityUtils.getSubject();

##

1 //获取主题对象 2 public static Subject getSubject() {3     Subject subject = ThreadContext.getSubject();//第一次null4     if (subject == null) {5        subject = (new Subject.Builder()).buildSubject();6        ThreadContext.bind(subject);7         }8       return subject;9 }

(1) Code analysis: Use the builder pattern to create objects:

 1 public static class Builder｛ 2        SubjectContext subjectContext; 3        SecurityManager securityManager; 4         public Builder(SecurityManager securityManager) { 5             if (securityManager == null) { 6                 throw new NullPointerException("SecurityManager method argument cannot be null."); 7             } 8             this.securityManager = securityManager; 9             this.subjectContext = newSubjectContextInstance();//DefaultSubjectContext（初始化一个backMap集合）10             if (this.subjectContext == null) {11                 throw new IllegalStateException("Subject instance returned from 'newSubjectContextInstance' " +12                         "cannot be null.");13             }14             this.subjectContext.setSecurityManager(securityManager);15         }16        public Subject buildSubject() {17             return this.securityManager.createSubject(this.subjectContext);18         }19 ｝

(2) Use the theme context to create a theme

 1   public Subject createSubject(SubjectContext subjectContext) { 2         //create a copy so we don't modify the argument's backing map: 3         SubjectContext context = copy(subjectContext); 4  5         //ensure that the context has a SecurityManager instance, and if not, add one: 6         context = ensureSecurityManager(context);//DefaultSubjectContext.backMap.put(SecurityManage) 7  8         //Resolve an associated Session (usually based on a referenced session ID), and place it in the context before 9         //sending to the SubjectFactory.  The SubjectFactory should not need to know how to acquire sessions as the10         //process is often environment specific - better to shield the SF from these details:11         context = resolveSession(context);12 13         //Similarly, the SubjectFactory should not require any concept of RememberMe - translate that here first14         //if possible before handing off to the SubjectFactory:15         context = resolvePrincipals(context);16 17         Subject subject = doCreateSubject(context);18 19         //save this subject for future reference if necessary:20         //(this is needed here in case rememberMe principals were resolved and they need to be stored in the21         //session, so we don't constantly rehydrate the rememberMe PrincipalCollection on every operation).22         //Added in 1.2:23         save(subject);24 25         return subject;26     }

(3) Create subject object through theme

 protected Subject doCreateSubject(SubjectContext context) {return getSubjectFactory().createSubject(context);
    }

 

(4)DefaultSubjectFactory创建主题对象：

 1    public Subject createSubject(SubjectContext context) { 2         SecurityManager securityManager = context.resolveSecurityManager(); 3         Session session = context.resolveSession(); 4         boolean sessionCreationEnabled = context.isSessionCreationEnabled(); 5         PrincipalCollection principals = context.resolvePrincipals(); 6         boolean authenticated = context.resolveAuthenticated(); 7         String host = context.resolveHost(); 8 9         return new DelegatingSubject(principals, authenticated, host, session, sessionCreationEnabled, securityManager);10     }

The above is the detailed content of Detailed introduction of shiro source code. For more information, please follow other related articles on the PHP Chinese website!