lazy-loading | 易学教程

PrimeFaces dialog lazy loading (dynamic=“true”) does not work?

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问题 I have recently changed all my beans from RequestScoped to ViewScoped . Suddenly, the lazy loading of dialogs does not work. I am using PrimeFaces JSF library. <html> <h:body> <f:view> <h:form> <p:commandButton id="addId" value="Add" title="Add" type="button" onclick="dlgMultiFileSelect.show();"/> ... </h:form> <p:dialog header="Dialog" widgetVar="dlgMultiFileSelect" modal="true" resizable="true" dynamic="true"> <ui:include src="/dialogs/media_browser.xhtml"/> </p:dialog> </f:view> </h:body>

Lazy-loaded NHibernate properties in Equals and GetHashCode

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问题 How can the following problem be dealt with? We're using lazy loaded NHibernate properties and whenever we're calling Equals() or GetHashCode() any properties used, will be lazy-loaded, potentially causing a cascade of lazy-loading operations. Eager-loading could be used as an alternative, but I think only in specific cases and not as a general solution. A typical scenario would look like this: public class AbstractSaveableObject { [Id(0, Name = "Id", UnsavedValue = null)] [Generator(1, Class

Using lazy for properties in Hibernate

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问题 The lazy attribute for property tag in hibernate allows to lazily load the property as per the link: http://docs.jboss.org/hibernate/orm/3.3/reference/en-US/html/mapping.html#mapping-declaration-property lazy (optional - defaults to false): specifies that this property should be fetched lazily when the instance variable is first accessed. It requires build-time bytecode instrumentation. But when I tried to set lazy=true for one of my property it is not loading it lazily in this example:

Entity Framework - what's the difference between using Include/eager loading and lazy loading?

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I've been trying to familiarize myself with the Entity Framework. Most of it seems straight forward, but I'm a bit confused on the difference between eager loading with the Include method and default lazy loading. Both seem like they load related entities, so on the surface it looks like they do the same thing. What am I missing? Let's say you have two entities with a one-to-many relationship: Customer and Order, where each Customer can have multiple Orders. When loading up a Customer entity, Entity Framework allows you to either eager load or lazy load the Customer's Orders collection. If you

angular2 rc.4 layz routing

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问题 Angular2 rc.4 lazy Routing is depreciated. Async Routing example is there any new lazy routing / async routing example for rc.4 回答1: loadChildren is supposed to do that: { path: 'section', loadChildren: 'section-bundle' } I don't know what exactly the string should point to. See also https://github.com/angular/angular/issues/9527#issuecomment-236038503 https://github.com/angular/angular/issues/10577 (with Plunker) { path: 'heroes', loadChildren: 'app/hero/hero.module' } 来源： https:/

Hibernate/Spring: failed to lazily initialize - no session or session was closed

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For an answer scroll down to the end of this... The basic problem is the same as asked multiple time. I have a simple program with two POJOs Event and User - where a user can have multiple events. @Entity @Table public class Event { private Long id; private String name; private User user; @Column @Id @GeneratedValue public Long getId() {return id;} public void setId(Long id) { this.id = id; } @Column public String getName() {return name;} public void setName(String name) {this.name = name;} @ManyToOne @JoinColumn(name="user_id") public User getUser() {return user;} public void setUser(User

Why not to use Spring's OpenEntityManagerInViewFilter

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While a lot of posts have been written on the subject of Spring's OpenSession/EntityManagerInViewFilter, I couldn't find any that mentions its flaws. From what I understand, and assuming a typical layered web application architecture using a @Transactional service layer, the filter works as follows: The filter intercepts a servlet request The filter opens an EntityManager and binds it to the current thread Web controller is called Web controller calls service Transaction interceptor begins a new transaction, retrieves the thread-bound EntityManager and binds it to the transaction Service is

How to Lazy Load div background images

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As many of you know it is widely used to lazy load images. Now i want to use this as lazy load div background images. How can i do that ? I am currently able to use http://www.appelsiini.net/projects/lazyload that plugin So i need to modify it in a way that it will work with div backgrounds Need help. Thank you. The below part i suppose lazy loads images $self.one("appear", function() { if (!this.loaded) { if (settings.appear) { var elements_left = elements.length; settings.appear.call(self, elements_left, settings); } $("<img />") .bind("load", function() { $self .hide() .attr("src", $self

When should one avoid using NHibernate's lazy-loading feature?

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问题 Most of what I hear about NHibernate's lazy-loading, is that it's better to use it, than not to use it. It seems like it just makes sense to minimize database access, in an effort to reduce bottlenecks. But few things come without trade-offs, certainly it slightly limits design by forcing you to have virtual properties. But I've also noticed that some developers turn lazy-loading off on certain often-used objects. This makes me wonder if there are some definite situations where data-access

Add class on OWL Carousel afterLazyLoad

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I'm using OWL Carousel , trying to add class .border-red to <div class="item"> after lazyLoad, means call this function after lazyLoad afterLazyLoad Example : $(".item").addClass("border-red"); when lazy loaded. Means add class function execute after OWLCarousel lazyLoaded. JS $(document).ready(function() { $("#owl-demo").owlCarousel({ items : 4, lazyLoad : true, navigation : true }); }); HTML <div id="owl-demo" class="owl-carousel"> <div class="item"><img class="lazyOwl" data-src="assets/owl1.jpg" alt="Lazy Owl Image"></div> <div class="item"><img class="lazyOwl" data-src="assets/owl1.jpg"