小编Dra*_*ian的帖子

我已经在我的react-native(v0.64)应用程序中启用了Hermes。每次我运行应用程序时，我都会得到以下堆栈跟踪。

dyld: dyld cache load error: shared cache file open() failed
dyld: Library not loaded: @rpath/hermes.framework/hermes
  Referenced from: /Users/sharktank/Library/Developer/CoreSimulator/Devices/A32F4931-51A8-4D22-AEFB-625F834CE221/data/Containers/Bundle/Application/71773888-08D5-4B82-9545-07F6B1538864/COSPM-DEV.app/COSPM-DEV
  Reason: image not found
dyld: launch, loading dependent libraries
DYLD_SHARED_CACHE_DIR=/Users/sharktank/Library/Developer/CoreSimulator/Caches/dyld/20E232/com.apple.CoreSimulator.SimRuntime.iOS-14-4.18D46
DYLD_ROOT_PATH=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot
DYLD_LIBRARY_PATH=/Users/sharktank/Library/Developer/Xcode/DerivedData/COSPM-atbujvbobdbyehckyoqrdgmqiubm/Build/Products/Debug-iphonesimulator:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/system/introspection
DYLD_INSERT_LIBRARIES=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS.simruntime/Contents/Resources/RuntimeRoot/usr/lib/libBacktraceRecording.dylib:/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Library/Developer/CoreSim
(lldb) 

我已经在 Podfile 中启用了 Hermes，在 pod install 后，Pods 文件夹中可以使用 pod。项目与其他项目一起采用单一存储库架构。在同一个 mono-repo 包中启用 Hermes 的另一个应用程序工作正常，没有崩溃。

播客文件：

require_relative '../../../node_modules/react-native/scripts/react_native_pods'
require_relative '../../../node_modules/@react-native-community/cli-platform-ios/native_modules'

platform :ios, '10.0'
source 'https://github.com/CocoaPods/Specs.git'

target 'COSPM' do
  config = use_native_modules!

  use_react_native!(
    :path => config[:reactNativePath],
    # to enable hermes on iOS, change `false` to `true` and then install pods …

我正在尝试更新MySql Db中的记录.更新它时抛出以下异常

org.hibernate.HibernateException: Illegal attempt to associate a collection with two open sessions
at org.hibernate.collection.AbstractPersistentCollection.setCurrentSession(AbstractPersistentCollection.java:410)
at org.hibernate.event.def.OnUpdateVisitor.processCollection(OnUpdateVisitor.java:43)
at org.hibernate.event.def.AbstractVisitor.processValue(AbstractVisitor.java:101)
at org.hibernate.event.def.AbstractVisitor.processValue(AbstractVisitor.java:61)
at org.hibernate.event.def.AbstractVisitor.processEntityPropertyValues(AbstractVisitor.java:55)
at org.hibernate.event.def.AbstractVisitor.process(AbstractVisitor.java:123)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performUpdate(DefaultSaveOrUpdateEventListener.java:293)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.entityIsDetached(DefaultSaveOrUpdateEventListener.java:223)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.performSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:89)
at org.hibernate.event.def.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:70)
at org.hibernate.impl.SessionImpl.fireSaveOrUpdate(SessionImpl.java:507)
at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:499)
at org.hibernate.impl.SessionImpl.saveOrUpdate(SessionImpl.java:495)
at com.tcs.ignite.ih.spring.dao.UserDAOImpl.saveUpdateUserbean(UserDAOImpl.java:185)
at com.tcs.ignite.ih.spring.dao.UserDAOImpl.blockuser(UserDAOImpl.java:204)
at com.tcs.ignite.ih.spring.service.UserServiceImpl.blockUser(UserServiceImpl.java:187)
at com.tcs.ignite.ih.spring.controller.AdminHomeController.BlockUser(AdminHomeController.java:48)

我检查会议.它在每个方法的最后块中关闭.无法弄清楚出了什么问题.我能够使用其他方法insertupdate opertion没有任何问题,但只有saveUpdateUserBean方法抛出异常

在UserDAOImpl:

import com.tcs.ignite.ih.hibernate.model.Userdetails;
import com.tcs.ignite.ih.hibernate.model.Userlog;
import com.tcs.ignite.ih.hibernate.model.Userrole;
import com.tcs.ignite.ih.spring.bean.LoginBean;
import com.tcs.ignite.ih.spring.util.LogFile;
import java.util.List;
import org.hibernate.Hibernate;
import org.hibernate.SQLQuery;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.Transaction;
import org.hibernate.criterion.Restrictions;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Repository;
import org.springframework.transaction.annotation.Transactional; …

我试图像这样实现mouseOver效果.

我能够根据它们的位置生成每个瓷砖所需的css3d矩阵.

我已经通过慢速鼠标移动实现了这种效果,但是如果我从一个瓷砖快速移动到另一个瓷砖,则它不能正常更新.它在瓷砖之间显示出差距.在鼠标悬停时更新所有tile/tile坐标的最佳方法是什么,以便获得一致的效果？

这是我的js代码:

 $('.box').each(function() {
            $(this).css('height', '284px');
            $(this).css('width', '284px');
        });

        generateGrid = function(w, h) {
            var t = this;
            this.p = [];
            var d = 30;


            var c = Math.floor($('.w').outerWidth() / 284 + 1);
            var r = Math.ceil($('.w').outerHeight() / 284) + 1;
            var vc = c * r;
            for (i = 0; i < vc; i++) {
                var l = {
                    x: Math.floor(i % c) * 284,
                    y: Math.floor(i / c) * 284
                };
                this.p.push(l);
            }
            var m = …

当我们将鼠标移动到中心div时,我正在尝试使用css3和javascript实现以下效果(MouseOver效果)

我创建了一个小型库,它接受3个参数元素,sourcePoints,目标点并返回css3D矩阵和更新元素.这是我的javascript代码.

var BLEND = BLEND || {};

BLEND.Util = BLEND.Util || {};

function print(msg) {
    console.log(msg);
}
BLEND.Util.VendorPrefix = "";
BLEND.Util.DetectVendorPrefix = function() {
var styles = window.getComputedStyle(document.documentElement, ''),
        pre = (Array.prototype.slice.call(styles).join('').match(/-(moz|webkit|ms)-/) || (styles.OLink === '' && ['', 'o']))[1];
BLEND.Util.VendorPrefix = pre[0].toUpperCase() + pre.substr(1) + "Transform";
}
BLEND.Util.DetectVendorPrefix();
BLEND.TransformElement = function(elm, src, dest) {
var L = [[0, 0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0, 0],
    [0, 0, 0, 0, 0, 0, …

我正在学习Spring并尝试实现Springs Security.我无法理解它是如何工作的.我阅读了从中了解以下内容的教程:

1. 我们必须配置web.xml来委托代理和模式
2. 我们需要向dispatcher-servlet.xml添加拦截

当提出请求时它会触发拦截但在此之后我无法理解它是如何工作的.如果有人能提供一系列要遵循的步骤,将会很有帮助.我正在使用Hibernate和Spring(都带有注释),我想使用Hibernate对用户进行身份验证.

我无法在Spring项目中找出NullPointer异常的原因.有时项目工作正常,但有时候它抛出空指针Exception在这里是完全stacktrace.

org.apache.jasper.JasperException: javax.servlet.ServletException: java.lang.NullPointerException
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:585)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:455)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:322)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:116)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:182)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:184)
org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:155)
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)

root cause

javax.servlet.ServletException: java.lang.NullPointerException
org.apache.jsp.redirect_jsp._jspService(index_jsp.java:72)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:432)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:390)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:334)
javax.servlet.http.HttpServlet.service(HttpServlet.java:728)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:322)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:116)
org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:83)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:182)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334)
org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:184)
org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:155)
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:346)
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:259)

root cause

 java.lang.NullPointerException
org.apache.catalina.session.ManagerBase.generateSessionId(ManagerBase.java:807)
org.apache.catalina.session.ManagerBase.createSession(ManagerBase.java:653)
org.apache.catalina.connector.Request.doGetSession(Request.java:2892)
org.apache.catalina.connector.Request.getSession(Request.java:2315)
org.apache.catalina.connector.RequestFacade.getSession(RequestFacade.java:898) …