Examples of org.jvnet.hk2.component.ServiceContext

org.jvnet.hk2.component.Scope
Information about a service.
Note that ServiceContext implementations are usually transient objects in the system during processing and as such they should not be cached, or used for comparison purposes with other contexts. They are informational only. @See RunLevelListener @author Jeff Trent @since 3.1


    public T create(Inhabitant onBehalfOf) throws ComponentException {
        try {
            return type.newInstance();
        } catch (InstantiationException e) {
            throw new ComponentException("Failed to create "+type,e);
        } catch (IllegalAccessException e) {
            throw new ComponentException("Failed to create "+type,e);
        } catch (LinkageError e) {
            throw new ComponentException("Failed to create "+type,e);
        } catch (RuntimeException e) {
            throw new ComponentException("Failed to create "+type,e);
        }
    }

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      }
  
      // other general case
      Scope scope = habitat.getByType(scopeClass);
      if (scope==null) {
          throw new ComponentException("Failed to look up %s", scopeClass);
      }
  
      return new ScopedInhabitant<T>(creator,scope);
  }

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  static void validate(Object target, Object injectedVal) {
      if (null != injectedVal) {
          RunLevel targetRL = AbstractInhabitantImpl.getAnnotation(target.getClass(), RunLevel.class, false);
          RunLevel injectedValRL = AbstractInhabitantImpl.getAnnotation(injectedVal.getClass(), RunLevel.class, false);
          if (null == targetRL && null != injectedValRL) {
              throw new ComponentException("invalid dependency from a non-RunLevel instance " +
                  target + " to a RunLevel instance " + injectedVal);
        }
    }
  }

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      Integer planned = state.getPlannedRunLevel();
      planned = (null == planned) ? DefaultRunLevelService.KERNEL_RUNLEVEL : planned;
      Integer current = state.getCurrentRunLevel();
      current = (null == current) ? DefaultRunLevelService.KERNEL_RUNLEVEL : current;
      if (null == planned || runLevel > planned || runLevel > current + 1) {
        throw new ComponentException("unable to activate " + this + "; minimum expected RunLevel is: " + runLevel +
            "; planned is: " + planned + "; current is: " + current);
      }
    }
  }

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    public WonderlandAppServer(Server server) {
        this.server = server;


        // add a module to properly specify the classpath
        Habitat h = server.getHabitat();
        ModulesRegistry mr = h.getComponent(ModulesRegistry.class);
        mr.add(new ClasspathModuleDefinition(WebServerLauncher.getClassLoader()));
    }

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    public Habitat createHabitat() throws ComponentException {
        if (null != habitatFactory) {
          return habitatFactory.newHabitat();
        }
        
        return new Habitat(); 
    }

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            if (replacements.containsKey(typeName)) {
                // create a replacement instead
                Class<?> target = replacements.get(typeName);
                if(target!=null) {
                    inhabitantParser.setImplName(target.getName());
                    Inhabitant i = null;
                    try {
                      i = Inhabitants.create(target,habitat,inhabitantParser.getMetaData());
                    } catch (Exception e) {
                      log(typeName, e);
                    }

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      assert(null != rl) : typeName + " is a problem; " + i + " has no RunLevel annotation";
      assert(!i.isInstantiated()) : "inhabitant should not be active: " + i;


      // get the appropriate RLS for this RunLevel
      RunLevelService<?> rls = runLevelServices.get(habitat, rl);
      InhabitantListener listener = InhabitantListener.class.isInstance(rls) ?
          InhabitantListener.class.cast(rls) : null;


      // wrap the inhabitant with a RunLevelInhabitant
      int runLevel = rl.value();

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  protected void notify(InhabitantListener.EventType eventType) {
    if (null != listeners) {
      Iterator<InhabitantListener> iter = listeners.iterator();
      while (iter.hasNext()) {
        InhabitantListener listener = iter.next();
        try {
          boolean keepListening = listener.inhabitantChanged(eventType, this);
          if (!keepListening) {
            removeInhabitantListener(listener);
          }
        } catch (Exception e) {
          // don't percolate the exception since it may negatively impact processing

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      if (scopeClass== Singleton.class) {
          return new SingletonInhabitant<T>(creator);
      }
  
      // other general case
      Scope scope = habitat.getByType(scopeClass);
      if (scope==null) {
          throw new ComponentException("Failed to look up %s", scopeClass);
      }
  
      return new ScopedInhabitant<T>(creator,scope);

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