Question about clearing the cache ??

Question

Hello,

i was wondering if we can clear the cache through code, on demand ??? is that possible ??

thank you

Ranga_Tolapi · Answer

This java code works...

import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

private static void clearRestCache(String server, String username, String password) {
        DefaultHttpClient httpclient = new DefaultHttpClient();
        try {
         String loginUrl = "http://" + server + ":8399/arcgis/rest/admin/login";
         String cacheClearUrl = "http://" + server + ":8399/arcgis/rest/admin/cache/clear"; 
            HttpGet httpget = new HttpGet(loginUrl + "?username=" + username + "&password=" + password + "&redirect=" + cacheClearUrl);
            httpclient.execute(httpget);
        } catch (Exception e) {
         e.printStackTrace();
        } finally {
            httpclient.getConnectionManager().shutdown();
        }
 }

Ranga_Tolapi · Answer

Can any one give me the java equivalent code to achieve this.

VasylMelnychuk · Answer

xnoor,

I have forgotten that WebClient is not supporting cookies (but it is required).

Override WebClient class to support cookies
        public class CookieAwareWebClient : WebClient
        {
            private CookieContainer m_container = new CookieContainer();
            protected override WebRequest GetWebRequest(Uri address)
            {
                WebRequest request = base.GetWebRequest(address);
                if (request is HttpWebRequest)
                    (request as HttpWebRequest).CookieContainer = m_container;
                return request;
            }
        }

Also you may convert response bytes to string:
            using (CookieAwareWebClient client = new CookieAwareWebClient())
            {
                client.Headers["Content-type"] = "application/x-www-form-urlencoded";
                client.Encoding = System.Text.Encoding.UTF8;
                var collection = new System.Collections.Specialized.NameValueCollection();
                collection.Add("username", adminUserName);
                collection.Add("password", adminPassword);
                collection.Add("redirect", "http://[server]/ArcGIS/rest/admin/cache/clear");
                var response = client.UploadValues("http://[server]/ArcGIS/rest/admin/login", collection);
                MemoryStream stream = new MemoryStream(response);
                StreamReader reader = new StreamReader(stream);
                String responseString = reader.ReadToEnd();               
            }

I have tried this... it works for me...

Regards,
Vasyl Melnychuk