小编cbm*_*eks的帖子

我的Hibernate下有MySQL,我也使用c3p0-0.9.1连接池.

在笔记本电脑上运行时(我的意思是在本地)我没有错误.但是当我在服务器上部署它时,我得到了这个异常:

com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.

这是我的堆栈跟踪:

    root cause

com.mchange.v2.resourcepool.CannotAcquireResourceException: A ResourcePool could not acquire a resource from its primary factory or source.
 com.mchange.v2.resourcepool.BasicResourcePool.awaitAvailable(BasicResourcePool.java:1319)
 com.mchange.v2.resourcepool.BasicResourcePool.prelimCheckoutResource(BasicResourcePool.java:557)
 com.mchange.v2.resourcepool.BasicResourcePool.checkoutResource(BasicResourcePool.java:477)
 com.mchange.v2.c3p0.impl.C3P0PooledConnectionPool.checkoutPooledConnection(C3P0PooledConnectionPool.java:525)
 com.mchange.v2.c3p0.impl.AbstractPoolBackedDataSource.getConnection(AbstractPoolBackedDataSource.java:128)
 org.hibernate.connection.C3P0ConnectionProvider.getConnection(C3P0ConnectionProvider.java:78)
 org.hibernate.jdbc.ConnectionManager.openConnection(ConnectionManager.java:446)
 org.hibernate.jdbc.ConnectionManager.getConnection(ConnectionManager.java:167)
 org.hibernate.jdbc.JDBCContext.connection(JDBCContext.java:142)
 org.hibernate.transaction.JDBCTransaction.begin(JDBCTransaction.java:85)
 org.hibernate.impl.SessionImpl.beginTransaction(SessionImpl.java:1463)
 sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
 sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 java.lang.reflect.Method.invoke(Method.java:616)
 org.hibernate.context.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:344)
 $Proxy8.beginTransaction(Unknown Source)
 com.hposg.domain.HPOSG.getItstance(HPOSG.java:56)
 com.hposg.domain.Game.<init>(Game.java:43)
 com.hposg.domain.GlobalGame.<init>(GlobalGame.java:12)
 com.hposg.domain.SiteAdmin.createNewGame(SiteAdmin.java:18)
 com.hposg.controller.struts.InitializingAction.execute(InitializingAction.java:45)
 sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
 sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 java.lang.reflect.Method.invoke(Method.java:616)
 com.opensymphony.xwork2.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:441)
 com.opensymphony.xwork2.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:280)
 com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:243)
 com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:165)
 com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
 com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
 com.opensymphony.xwork2.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:252)
 org.apache.struts2.interceptor.validation.AnnotationValidationInterceptor.doIntercept(AnnotationValidationInterceptor.java:68)
 com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
 com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
 com.opensymphony.xwork2.interceptor.ConversionErrorInterceptor.intercept(ConversionErrorInterceptor.java:122)
 com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
 com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
 com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
 com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237)
 com.opensymphony.xwork2.interceptor.ParametersInterceptor.doIntercept(ParametersInterceptor.java:195)
 com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:87)
 com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:237) …

我最近升级到Lion,一切都很好.甚至重启机器几次.然后在周末,Rails走了!我的所有宝石都没了.我发誓我不知道发生了什么.它工作得很好.

仔细观察后,RVM本身就消失了.

所以,我重新安装RVM并尝试安装Ruby 1.9.2并得到此错误日志:

[2011-08-08 14:30:41]  ./configure --prefix="/Users/cbmeeks/.rvm/usr"  
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... config/install-sh -c -d
checking for gawk... no
checking for mawk... no
checking for nawk... no
checking for awk... awk
checking whether make sets $(MAKE)... no
checking for gcc... /usr/bin/gcc-4.2
checking whether the C compiler works... no
configure: error: in `/Users/cbmeeks/.rvm/src/yaml-0.1.4':
configure: error: C compiler cannot create executables
See `config.log' for …

假设我有一个类似的存储库:

public interface MyRepository extends PagingAndSortingRepository<MyEntity, String> {

    @Query("....")
    Page<MyEntity> findByCustomField(@Param("customField") String customField, Pageable pageable);
}

这非常有效.但是,如果客户端发送已形成的请求(例如,搜索不存在的字段),则Spring将异常作为JSON返回.揭示@Query等等

// This is OK
http://example.com/data-rest/search/findByCustomField?customField=ABC

// This is also OK because "secondField" is a valid column and is mapped via the Query
http://example.com/data-rest/search/findByCustomField?customField=ABC&sort=secondField

// This throws an exception and sends the exception to the client
http://example.com/data-rest/search/findByCustomField?customField=ABC&sort=blahblah

抛出并发送给客户端的异常示例:

{
    message:null,
    cause: {
        message: 'org.hibernate.QueryException: could not resolve property: blahblah...'
    }
}

我该如何处理这些例外情况？通常,我使用的@ExceptionHandler是我的MVC控制器,但我没有使用Data Rest API和客户端之间的层.我是不是该？

谢谢.

我似乎无法找到这些信息.但是使用地理搜索你可以指定$maxDistance但是对于我的生活,我无法找到它是英里,公里等.

这是我正在使用的示例查询:

db.hotels.find( { location: { $near : [18.74255, 99.03523], $maxDistance : 0.05 } } ).count()

返回15(来自我的酒店数据库).

感谢您提供任何信息.

假设我的HTML文档如下:

<div class="headline">News</div>
<p>Some interesting news here</p>
<div class="headline">Sports</div>
<p>Baseball is fun!</p>

我可以headline使用以下代码获取div:

require 'rubygems'
require 'nokogiri'
require 'open-uri'

url = "mypage.html"
doc = Nokogiri::HTML(open(url))

doc.css(".headline").each do |item|  
  puts item.text
end 

但是如何访问以下p标记中的内容以便News与之相关Some interesting news here？

我见过很多例子com.mycompany.someapp.似乎是域的反面.这对我来说真的很有意义.

但在一天结束时,它真的重要吗？我们是一家小商店,所以也许我们没有看到正确域名命名的好处.

那么,将它命名为与域匹配是一种好习惯吗？如果是这样,为什么？

我认为socket.io的重点是不必担心现代浏览器？大声笑

无论如何,我是socket编程的新手.我有一个小应用程序,只是模仿鼠标移动.

您打开了几个浏览器,当您移动鼠标时,您的操作将记录在其他浏览器中.它移动一个小方块.有点酷.但是,当我在iPad(iOS6)上打开它时什么都没有!套接字没有连接.我甚至在connect活动中发出警报信息,什么都没有.

在我的笔记本电脑上使用IE,FF和Chrome就好了.唯一的区别是我的开发机器localhost在iPad使用机器的IP时使用.但是,当我在笔记本电脑上连接到我的本地IP时,它仍然有效.只是不在Safari/iPad中.

这是我的服务器.

    var app = require('http').createServer(handler),
        io = require('socket.io').listen(app),
        fs = require('fs');


    app.listen(80);

    function handler(req, res) {
        var file = __dirname + '/public/index.html';
        fs.readFile(file, 
            function(err, data) {
                if(err) {
                    res.writeHead(500);
                    return res.end('Error loading index.html');
                }

                res.writeHead(200);
                res.end(data);
            }
        );
    }


    var rooms = ['abc', 'test1'];

    var sockets = [];
    io.sockets.on('connection', function(socket) {
        sockets.push(socket);

        socket.on('m', function(data) {
            socket.broadcast.to(socket.room).emit('relay', {msg: 'MouseX: ' + data.x + ' MouseY: ' + data.y, x: data.x, y: data.y});
        }); …

你认为使用EC2实例(Micro,64bit)对MongoDB副本集有好处吗？

看起来如果这就是他们所做的一切,并且有超过600兆的RAM,人们可以使用它们来获得一个不错的设置.

此外,他们也会制作好的主(写)服务器吗？

我的数据库现在只有1-2演出,但我看到它今年增长到20-40演出(希望如此).

谢谢

所以,我有这个场景,我需要获取标题记录,删除它的详细信息,然后以不同的方式重新创建详细信息.更新细节会非常麻烦.

我基本上有:

@Transactional
public void create(Integer id, List<Integer> customerIDs) {

    Header header = headerService.findOne(id);
    // header is found, has multiple details

    // Remove the details
    for(Detail detail : header.getDetails()) {
        header.getDetails().remove(detail);
    }

    // Iterate through list of ID's and create Detail with other objects
    for(Integer id : customerIDs) {
        Customer customer = customerService.findOne(id);

        Detail detail = new Detail();
        detail.setCustomer(customer);

        header.getDetails().add(detail);
    }

    headerService.save(header);
}

现在,数据库具有如下约束:

Header
=================================
ID, other columns...

Detail
=================================
ID, HEADER_ID, CUSTOMER_ID

Customer
=================================
ID, other columns...

Constraint: …

所以我正在使用ExtJS 4.1.我有一个包含两个项目的视口.它们堆叠正确但我想在它们之间留出一些空间.边距似乎不起作用.

var required = '<span style="color:red;font-weight:bold" data-qtip="Required">*</span>';

Ext.onReady(function() {
    Ext.QuickTips.init();

    window.formPanel = Ext.widget({
        bodyPadding: '5 5 0',
        collapsible: false,
        defaultType: 'textfield',
        frame: true,
        id: 'formPanel',
        layout: 'form',
        renderTo: '',
        title: 'Spring Demo 3 (Lookup Transfer Request)',
        url: contextPath + '/users/ajax',
        width: 450,
        xtype: 'form',

        buttons: [{
            text: 'Check Status',
            scope: this,
            handler: function() {
                formPanel.getForm().submit({
                    success: function(res, req) {

                    }
                });
            }
        }],

        fieldDefaults: {
            msgTarget: 'side',
            labelWidth: 105
        },

        items: [{
            afterLabelTextTpl: required,
            allowBlank: false,
            fieldLabel: 'Username',
            name: …