Java HTTP Client Request with defined timeout

Question

I would like to make BIT  Built in tests  to a number of server in my cloud  I need the request to fail on large timeout   How should I do this with java   Trying something like the below does not seem to work   public class TestNodeAliveness    public static NodeStatus nodeBIT String elasticIP  throws ClientProtocolException  IOException     HttpClient client   new DefaultHttpClient      client getParams   setIntParameter  http connection timeout   1      HttpUriRequest request   new HttpGet  http   192 168 20 43      HttpResponse response   client execute request      System out println response toString       return null        public static void main String   args  throws ClientProtocolException  IOException     nodeBIT             -- EDIT  Clarify what library is being used --  I m using httpclient from apache  here is the relevant pom xml section    lt dependency gt      lt groupId gt org apache httpcomponents lt  groupId gt      lt artifactId gt httpclient lt  artifactId gt      lt version gt 4 0 1 lt  version gt      lt type gt jar lt  type gt    lt  dependency gt

User · Answer

It looks like you are using the HttpClient API  which I know nothing about  but you could write something similar to this using core Java   try       HttpURLConnection con    HttpURLConnection  new URL url  openConnection       con setRequestMethod  HEAD       con setConnectTimeout 5000     set timeout to 5 seconds    return  con getResponseCode      HttpURLConnection HTTP OK      catch  java net SocketTimeoutException e       return false    catch  java io IOException e       return false

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Op later stated they were using Apache Commons HttpClient 3 0 1   HttpClient client   new HttpClient            client getHttpConnectionManager   getParams   setConnectionTimeout 5000           client getHttpConnectionManager   getParams   setSoTimeout 5000

User · Answer

import org apache http client HttpClient  import org apache http impl client DefaultHttpClient  import org apache http params BasicHttpParams  import org apache http params HttpConnectionParams  import org apache http params HttpParams               set the connection timeout value to 30 seconds  30000 milliseconds      final HttpParams httpParams   new BasicHttpParams        HttpConnectionParams setConnectionTimeout httpParams  30000       client   new DefaultHttpClient httpParams

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The said method with highest up s by Laz is deprecated from version 4 3 onwards  Hence it would be better to user the Request Config Object and then build the HTTP Client      private CloseableHttpClient createHttpClient                     CloseableHttpClient httpClient          CommonHelperFunctions helperFunctions   new CommonHelperFunctions            PoolingHttpClientConnectionManager cm   new PoolingHttpClientConnectionManager            cm setMaxTotal 306           cm setDefaultMaxPerRoute 108           RequestConfig requestConfig   RequestConfig custom                setConnectTimeout 15000               setSocketTimeout 15000  build            httpClient   HttpClients custom                setConnectionManager cm               setDefaultRequestConfig requestConfig  build            return httpClient              The PoolingHttpClientConnectionManager is user to set the max default number of connections and the max number of conncetions per route  I have set it as 306 and 108 respectively  The default values will not be sufficient for most of the cases   For setting Timeout  I have used the RequestConfig object  You can also set the property Connection Request Timeout for setting timeout for waiting for connection from Connection manager

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I found that setting the time out settings in HttpConnectionParams and HttpConnectionManager did not solve our case  We re limited to using org apache commons httpclient version 3 0 1   I ended up using an java util concurrent ExecutorService to monitor the HttpClient executeMethod   call   Here s a small  self-contained example  import org apache commons httpclient HttpClient  import org apache commons httpclient methods EntityEnclosingMethod  import org apache commons httpclient methods PostMethod  import org apache commons httpclient methods multipart FilePart  import org apache commons httpclient methods multipart MultipartRequestEntity  import org apache commons httpclient methods multipart Part  import java io File  import java io IOException  import java util Arrays  import java util List  import java util concurrent             author Jeff Kirby     since  lt pre gt Jun 17  2011 lt  pre gt      public class Example       private static final String SITE    http   some website com upload      private static final int TIME OUT SECS   5         upload a file and return the response as a string    public String post File file  throws IOException  InterruptedException         final Part   multiPart     new FilePart  file   file getName    file           final EntityEnclosingMethod post   new PostMethod SITE         post setRequestEntity new MultipartRequestEntity multiPart  post getParams            final ExecutorService executor   Executors newSingleThreadExecutor          final List lt Future lt Integer gt  gt  futures   executor invokeAll Arrays asList new KillableHttpClient post    TIME OUT SECS  TimeUnit SECONDS         executor shutdown          if futures get 0  isCancelled               throw new IOException SITE     has timed out  It has taken more than     TIME OUT SECS     seconds to respond                  return post getResponseBodyAsString             private static class KillableHttpClient implements Callable lt Integer gt           private final EntityEnclosingMethod post         private KillableHttpClient EntityEnclosingMethod post             this post   post                 public Integer call   throws Exception            return new HttpClient   executeMethod post

User · Answer

HttpParams is deprecated in the new Apache HTTPClient library  Using the code provided by Laz leads to deprecation warnings    I suggest to use RequestConfig instead on your HttpGet or HttpPost instance    final RequestConfig params   RequestConfig custom   setConnectTimeout 3000  setSocketTimeout 3000  build    httpPost setConfig params

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HttpConnectionParams setSoTimeout params  10 60 1000     for 10 mins i have set the timeout  You can as well define your required time out

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This was already mentioned in a comment by benvoliot above  But  I think it s worth a top-level post because it sure had me scratching my head  I m posting this in case it helps someone else out   I wrote a simple test client and the CoreConnectionPNames CONNECTION TIMEOUT timeout works perfectly in that case  The request gets canceled if the server doesn t respond   Inside the server code I was actually trying to test however  the identical code never times out   Changing it to time out on the socket connection activity  CoreConnectionPNames SO TIMEOUT  rather than the HTTP connection  CoreConnectionPNames CONNECTION TIMEOUT  fixed the problem for me   Also  read the Apache docs carefully  http   hc apache org httpcomponents-core-ga httpcore apidocs org apache http params CoreConnectionPNames html CONNECTION TIMEOUT   Note the bit that says      Please note this parameter can only be applied to connections that are bound to a particular local address    I hope that saves someone else all the head scratching I went through  That will teach me not to read the documentation thoroughly

User · Answer

If you are using Http Client version 4 3 and above you should be using this   RequestConfig requestConfig   RequestConfig custom   setConnectTimeout 30   1000  build    HttpClient httpClient   HttpClientBuilder create   setDefaultRequestConfig requestConfig  build

[java] Java HTTP Client Request with defined timeout

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