Use [`HttpResponse.getStatusLine()`][1], which returns a `StatusLine` object containing the status code, protocol version and &quot;reason&quot;.


  [1]: http://hc.apache.org/httpcomponents-core-ga/httpcore/apidocs/org/apache/http/HttpResponse.html#getStatusLine%28%29

I have used `httpResponse.getStatusLine().getStatusCode()` and have found this to reliably return the integer http status code.

    httpResponse.getStatusLine().getStatusCode()

A example will be as below,

            final String enhancementPayload =&quot;sunil kumar&quot;;
            HttpPost submitFormReq = new HttpPost(&quot;https://bgl-ast/rest/service/form/form-data&quot;);
    		StringEntity enhancementJson = new StringEntity(enhancementPayload);
    		submitFormReq.setEntity(enhancementJson);
    		submitFormReq.setHeader(&quot;Content-Type&quot;, &quot;application/xml&quot;);
    
    		HttpResponse response = httpClient.execute( submitFormReq );
    		String result = EntityUtils.toString(response.getEntity());
    		System.out.println(&quot;result &quot;+result);
    		assertEquals(200, response.getStatusLine().getStatusCode());

I&#39;m studying the wikipedia API, 

[some demo api call][1]


  [1]: http://en.wikipedia.org/w/api.php?action=query&amp;generator=search&amp;gsrsearch=meaning&amp;srprop=size%7Cwordcount%7Ctimestamp%7Csnippet


What is the pageid? How do I change it into a real page url?

I mean `&lt;page pageid=&quot;18630637&quot; ns=&quot;0&quot; title=&quot;Translation&quot; /&gt;`, how to change `18630637` into `http://en.wikipedia.org/wiki/Translation`? 

What is wikipedia pageid? how to change it into real page url?

I am getting the following error on my new installation of ASP.Net and SQL Server when I run my app:

     Execution of user code in the .NET Framework is disabled. Enable &quot;clr enabled&quot; configuration option


I have tried to fix it by running this:

     use dasolPSDev;

     sp_configure &#39;clr enabled&#39;, 1
     go
     RECONFIGURE
     go
     sp_configure &#39;clr enabled&#39;
     go

But then I get:

     Msg 102, Level 15, State 1, Line 3
     Incorrect syntax near &#39;sp_config


ASP.NET CLR Not Enabled

I&#39;m using the `org.apache.http.HttpResponse` class in my Java application, and I need to be able to get the HTTP status code. If I used `.toString()` on it, I can see the HTTP status code in there. Is there any other function that I can just get the HTTP status code as either an int or String?

Thanks a bunch!

Get HTTP code from org.apache.http.HttpResponse

<p>I'm using the <code>org.apache.http.HttpResponse</code> class in my Java application, and I need to be able to get the HTTP status code. If I used <code>.toString()</code> on it, I can see the HTTP status code in there. Is there any other function that I can just get the HTTP status code as either an int or String?</p>
<p>Thanks a bunch!</p>


I have the following (maybe common) problem and it absolutely puzzles me at the moment:

There are a couple of generated event objects which extends the abstract class `Event` and I want to divide them to Session Beans, like

	public void divideEvent(Event event) {
		if (event instanceof DocumentEvent) {
			documentGenerator.gerenateDocument(event);
		} else if (event instanceof MailEvent) {
			deliveryManager.deliverMail(event);
            ...
		}
        ...

	}

But there could be more than two event types in future, so the if-else will be long and maybe unreadable. Additionally I think `instanceof` is not really &quot;best practice&quot; in this case.

I could add an abstract method to the `Event` type and have them divide itself but then I have to inject the specific Session Beans within each entity.

Is there any hint to achieve a &quot;pretty&quot; solution for this problem?

Thanks for any help!

Avoiding &#39;instanceof&#39; in Java

I&#39;m using Spring Security 3 and Spring MVC 3.05.

I would like to print username of currently logged in user,how can I fetch UserDetails in my Controller?

    @RequestMapping(value=&quot;/index.html&quot;, method=RequestMethod.GET)
    	public ModelAndView indexView(){
             UserDetails user = ?
                    mv.addObject(&quot;username&quot;, user.getUsername());
    		ModelAndView mv = new ModelAndView(&quot;index&quot;);
    		return mv;
    	}	



Get UserDetails object from Security Context in Spring MVC controller

I am in need of Java library for graphs that supports dynamic visualization. I need to have objects moving between the vertices and this has to be shown. 3D is not needed, a 2D representation will suffice.

I am currently using *JUNG* but it is very limited, it is more for static graphs from what I can tell.

I have looked at [this][1] question but *JGraphT* doesn&#39;t seem to do it either.

---

*Late Edit:*

I waited to finish the project before awarding an answer. I ended up keeping JUNG, while also using [UBIGraph][2] (dead project since 2012) as a secondary library.


  [1]: https://stackoverflow.com/questions/51574/good-java-graph-algorithm-library
  [2]: http://ubietylab.net/ubigraph/

Java graph library for dynamic visualisation

I am trying to to understand **why Java&#39;s ArrayDeque is better than Java&#39;s LinkedList** as they both implement Deque interface. 

I hardly see someone using ArrayDeque in their code. If someone sheds more light into how ArrayDeque is implemented, it would be helpful. 

If I understand it, I will be more confident using it. I could not clearly understand the JDK implementation as to the way it manages head and tail references.

Why is ArrayDeque better than LinkedList

Although this question asked many times and I have already used all the suggestion but still I am getting this error.

The User.java is

    @Entity
	@Table(name = &quot;USER&quot;)
	public class User implements UserDetails, Serializable {
	
		private static final long serialVersionUID = 2L;
	
		@Id
		@Column(name = &quot;USER_ID&quot;)
		@GeneratedValue(strategy = GenerationType.IDENTITY)
		private long id;
		@Column(name = &quot;USERNAME&quot;)
		private String username;
		@Column(name = &quot;PASSWORD&quot;)
		private String password;
		@Column(name = &quot;NAME&quot;)
		private String name;
		@Column(name = &quot;EMAIL&quot;)
		private String email;
		@Column(name = &quot;LOCKED&quot;)
		private boolean locked;
		@OneToMany(cascade=CascadeType.ALL, fetch = FetchType.EAGER)
		@ElementCollection(targetClass=Role.class)
		@Column(name = &quot;ROLE_ID&quot;)
		private Set&lt;Role&gt; roles;
	
		@Override
		public GrantedAuthority[] getAuthorities() {
			List&lt;GrantedAuthorityImpl&gt; list = new ArrayList&lt;GrantedAuthorityImpl&gt;(0);
			for (Role role : roles) {
				list.add(new GrantedAuthorityImpl(role.getRole()));
			}
			return (GrantedAuthority[]) list.toArray(new GrantedAuthority[list.size()]);
		}
	
		@Override
		public boolean isAccountNonExpired() {
			return true;
		}
	
		@Override
		public boolean isAccountNonLocked() {
			return !isLocked();
		}
	
		@Override
		public boolean isCredentialsNonExpired() {
			return true;
		}
	
		@Override
		public boolean isEnabled() {
			return true;
		}
	
		public long getId() {
			return id;
		}
	
		public void setId(long id) {
			this.id = id;
		}
	
		public String getName() {
			return name;
		}
	
		public void setName(String name) {
			this.name = name;
		}
	
		public String getEmail() {
			return email;
		}
	
		public void setEmail(String email) {
			this.email = email;
		}
	
		public boolean isLocked() {
			return locked;
		}
	
		public void setLocked(boolean locked) {
			this.locked = locked;
		}
	
		@Override
		public String getUsername() {
			return username;
		}
	
		public void setUsername(String username) {
			this.username = username;
		}
	
		@Override
		public String getPassword() {
			return password;
		}
	
		public void setPassword(String password) {
			this.password = password;
		}
	
		public void setRoles(Set&lt;Role&gt; roles) {
			this.roles = roles;
		}
	
		public Set&lt;Role&gt; getRoles() {
			return roles;
		}
	}

And the Role.java is

    @Entity
	@Table(name=&quot;ROLE&quot;)
	public class Role implements Serializable {
	
		@Id
		@GeneratedValue(strategy = GenerationType.IDENTITY)
		@Column(name=&quot;ROLE_ID&quot;)
		private long id;
		@Column(name=&quot;USERNAME&quot;)
		private String username;
		@Column(name=&quot;ROLE&quot;)
		private String role;
	
		
		public long getId() {
			return id;
		}
	
		public void setId(long id) {
			this.id = id;
		}
	
		public String getUsername() {
			return username;
		}
	
		public void setUsername(String username) {
			this.username = username;
		}
	
		public String getRole() {
			return role;
		}
	
		public void setRole(String role) {
			this.role = role;
		}
	}

This is my first attempt in hibernate annotation with JPA. So any suggestions will be very helpful. 

For hibernate the pom.xml&#39;s dependencies are:

        &lt;dependency&gt;
			&lt;groupId&gt;org.hibernate&lt;/groupId&gt;
			&lt;artifactId&gt;hibernate&lt;/artifactId&gt;
			&lt;version&gt;3.5.4-Final&lt;/version&gt;
			&lt;type&gt;pom&lt;/type&gt;
			&lt;scope&gt;compile&lt;/scope&gt;
		&lt;/dependency&gt;
		&lt;dependency&gt;
			&lt;groupId&gt;org.hibernate&lt;/groupId&gt;
			&lt;artifactId&gt;hibernate-annotations&lt;/artifactId&gt;
			&lt;version&gt;3.5.4-Final&lt;/version&gt;
			&lt;type&gt;jar&lt;/type&gt;
			&lt;scope&gt;compile&lt;/scope&gt;
		&lt;/dependency&gt;
		
		&lt;dependency&gt;
			&lt;groupId&gt;org.hibernate&lt;/groupId&gt;
			&lt;artifactId&gt;hibernate-core&lt;/artifactId&gt;
			&lt;version&gt;3.5.4-Final&lt;/version&gt;
			&lt;type&gt;jar&lt;/type&gt;
			&lt;scope&gt;compile&lt;/scope&gt;
		&lt;/dependency&gt;
		&lt;dependency&gt;
			&lt;groupId&gt;org.hibernate&lt;/groupId&gt;
			&lt;artifactId&gt;hibernate-validator&lt;/artifactId&gt;
			&lt;version&gt;3.1.0.GA&lt;/version&gt;
			&lt;type&gt;jar&lt;/type&gt;
			&lt;scope&gt;compile&lt;/scope&gt;
		&lt;/dependency&gt;
		&lt;dependency&gt;
			&lt;groupId&gt;org.hibernate&lt;/groupId&gt;
			&lt;artifactId&gt;hibernate-entitymanager&lt;/artifactId&gt;
			&lt;version&gt;3.5.4-Final&lt;/version&gt;
			&lt;type&gt;jar&lt;/type&gt;
			&lt;scope&gt;compile&lt;/scope&gt;
		&lt;/dependency&gt;

I have no clue about the fault.

Thanks.

org.hibernate.MappingException: Could not determine type for: java.util.Set

i am getting the error 503 Service Temporarily Unavailable many times in my application
and i want to detect why this error occurs, how ? if there&#39;s a log file or something like that, since i am not familiar with apache.

second thing is that, is it possible to handle this error, that when it occurs apache is restarted ?

How to Detect cause of 503 Service Temporarily Unavailable error and handle it?

&gt; **NOTE: If you experience this issue as well, please upvote it on Apache JIRA:**
&gt;
&gt; https://issues.apache.org/jira/browse/XALANJ-2540


I have come to an astonishing conclusion that this:

    Element e = (Element) document.getElementsByTagName(&quot;SomeElementName&quot;).item(0);
    String result = ((Element) e).getTextContent();

Seems to be an incredible 100x faster than this:

    // Accounts for 30%, can be cached
    XPathFactory factory = XPathFactory.newInstance();

    // Negligible
    XPath xpath = factory.newXPath();

    // Negligible
    XPathExpression expression = xpath.compile(&quot;//SomeElementName&quot;);

    // Accounts for 70%
    String result = (String) expression.evaluate(document, XPathConstants.STRING);

I&#39;m using the JVM&#39;s default implementation of JAXP:

    org.apache.xpath.jaxp.XPathFactoryImpl
    org.apache.xpath.jaxp.XPathImpl

I&#39;m really confused, because it&#39;s easy to see how JAXP could optimise the above XPath query to actually execute a simple `getElementsByTagName()` instead. But it doesn&#39;t seem to do that. This problem is limited to around 5-6 frequently used XPath calls, that are abstracted and hidden by an API. Those queries involve simple paths (e.g. `/a/b/c`, no variables, conditions) against an always available DOM Document only. So, if an optimisation can be done, it will be quite easy to achieve.

My question: Is XPath&#39;s slowness an accepted fact, or am I overlooking something? Is there a better (faster) implementation? Or should I just avoid XPath altogether, for simple queries?

Java XPath (Apache JAXP implementation) performance

    The server encountered an internal error or misconfiguration and was unable to complete your request.
    
    Please contact the server administrator, nkutty@bics.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.
    
    More information about this error may be available in the server error log.
    Apache/2.2.0 (Fedora) Server at bbt.com Port 80

This works fine in my local system but it is not working in the server. Can anyone help to figure out why it is?
Thanks in advance!

The server encountered an internal error or misconfiguration and was unable to complete your request

I am trying to deploy mod_wsgi with apache to run a django application but I am getting an error 500 internal server error The apache logs shows:


    [Thu Jun 23 14:01:47 2011] [error] [client 152.78.95.64] mod_wsgi (pid=16142): Exception occurred processing WSGI script &#39;/home/user/bms/apache/django.wsgi&#39;.
    [Thu Jun 23 14:01:47 2011] [error] [client 152.78.95.64] Traceback (most recent call last):
    [Thu Jun 23 14:01:47 2011] [error] [client 152.78.95.64]   File &quot;/home/user/bms/apache/django.wsgi&quot;, line 13, in &lt;module&gt;
    [Thu Jun 23 14:01:47 2011] [error] [client 152.78.95.64]     import django.core.handlers.wsgi
    [Thu Jun 23 14:01:47 2011] [error] [client 152.78.95.64] ImportError: No module named django.core.handlers.wsgi

My apache virtual host is as follows:

    &lt;VirtualHost *:80&gt;
    
        DocumentRoot /home/user/bms
    
        &lt;Directory /home/user/bms&gt;
            Order allow,deny
            Allow from all
        &lt;/Directory&gt;
    
    WSGIDaemonProcess bms user=user group=user processes=2 threads=25 python-path=/usr/local/lib/python2.7/site-packages

    
        WSGIProcessGroup bms
    
        WSGIScriptAlias / /home/user/bms/apache/django.wsgi
    
    &lt;/VirtualHost&gt;

And the referenced wsgi file in my app directory with 0777 permissions:

    import os
    import sys
    
    path = &#39;/home/user/bms&#39;
    if path not in sys.path:
        sys.path.append(path)
    
    os.environ[&#39;DJANGO_SETTINGS_MODULE&#39;] = &#39;bms.settings&#39;
    
    import django.core.handlers.wsgi
    application = django.core.handlers.wsgi.WSGIHandler()


I heard that this may be because the apache user does not have the correct permissions. However I have no idea how to fix this. I also tried starting the deamon with the www-data user and this did not solve the issue.

**EDIT**:

I solved this by copying the virtual hosts file into the default one and then disabling the old one with a2dissite. I have no idea how I can do it &quot;properly&quot; and set it so apache goes to the virtual host I want it to though.

Target WSGI script cannot be loaded as Python module

I have a Ubuntu server running Apache2 with PHP 5. In the php.ini I set `display_errors =  On` and `error_reporting =  E_ALL | E_STRICT`, but PHP is still not displaying error messages. I&#39;m also using Apache virtual hosts.

Also, what is the most strict error reporting PHP5.3 has to offer? I want my code to as up-to-date and future-proof as possible.

PHP not displaying errors even though display_errors = On

I have written tests with Selenium2/WebDriver and want to test if HTTP Request returns an HTTP 403 Forbidden.

Is it possible to get the HTTP response status code with Selenium WebDriver?

How to get HTTP Response Code using Selenium WebDriver

We&#39;re using Flask for one of our API&#39;s and I was just wondering if anyone knew how to return a HTTP response 201?

For errors such as 404 we can call:

    from flask import abort
    abort(404)

But for 201 I get

&gt; LookupError: no exception for 201

Do I need to create my own exception like [this][1] in the docs?


  [1]: http://werkzeug.pocoo.org/docs/exceptions/#custom-errors

Return HTTP status code 201 in flask

I want to force the browser to download a `pdf` file.

I am using the following code :

    &lt;a href=&quot;../doc/quot.pdf&quot; target=_blank&gt;Click here to Download quotation&lt;/a&gt;

It makes the browser open the pdf in a new window, but I want it to download to the hard drive when a user clicks it.

I found that `Content-disposition` is used for this, but how do I use it in my case?

How to Use Content-disposition for force a file to download to the hard drive?

I read about _Pragma_ header on [Wikipedia](http://en.wikipedia.org/wiki/List_of_HTTP_header_fields) which says:

&gt; &quot;The Pragma: no-cache header field is an HTTP/1.0 header intended for
&gt; use in requests. It is a means for the browser to tell the server and
&gt; any intermediate caches that it wants a fresh version of the resource,
&gt; not for the server to tell the browser not to cache the resource. Some
&gt; user agents do pay attention to this header in responses, but the
&gt; HTTP/1.1 RFC specifically warns against relying on this behavior.&quot;

But I haven&#39;t understood what it does? What is the difference between the `Cache-Control` header whose value is `no-cache` and `Pragma` whose value is also `no-cache`?

Difference between Pragma and Cache-Control headers?

I&#39;m trying to return a status code of 304 not modified for a GET method in a web api controller.

The only way I succeeded was something like this:

    public class TryController : ApiController
    {
        public User GetUser(int userId, DateTime lastModifiedAtClient)
        {
            var user = new DataEntities().Users.First(p =&gt; p.Id == userId);
            if (user.LastModified &lt;= lastModifiedAtClient)
            {
                 throw new HttpResponseException(HttpStatusCode.NotModified);
            }
            return user;
        }
    }

The problem here is that it&#39;s not an exception, It&#39;s just not modified so the client cache is OK.
I also want the return type to be a User (as all the web api examples shows with GET) not return HttpResponseMessage or something like this.

Content Type	Original Author	Original Content on Stackoverflow
Question	Chiggins	View Question on Stackoverflow
Solution 1 - Java	matt b	View Answer on Stackoverflow
Solution 2 - Java	user1735872	View Answer on Stackoverflow
Solution 3 - Java	bentobox	View Answer on Stackoverflow
Solution 4 - Java	Linus	View Answer on Stackoverflow

Get HTTP code from org.apache.http.HttpResponse

Java Problem Overview

Java Solutions

Solution 1 - Java

Solution 2 - Java

Solution 3 - Java

Solution 4 - Java

ASP.NET CLR Not Enabled

What is wikipedia pageid? how to change it into real page url?

Attributions