org.argeo.cms/src/org/argeo/cms/integration/CmsExceptionsChain.java

   1 package org.argeo.cms.integration;
   2
   3 import java.io.IOException;
   4 import java.io.Writer;
   5
   6 import javax.servlet.http.HttpServletResponse;
   7
   8 import org.apache.commons.logging.Log;
   9 import org.apache.commons.logging.LogFactory;
  10 import org.argeo.util.ExceptionsChain;
  11
  12 import com.fasterxml.jackson.core.JsonGenerator;
  13 import com.fasterxml.jackson.core.JsonProcessingException;
  14 import com.fasterxml.jackson.databind.ObjectMapper;
  15
  16 /** Serialisable wrapper of a {@link Throwable}. */
  17 public class CmsExceptionsChain extends ExceptionsChain {
  18         public final static Log log = LogFactory.getLog(CmsExceptionsChain.class);
  19
  20         public CmsExceptionsChain() {
  21                 super();
  22         }
  23
  24         public CmsExceptionsChain(Throwable exception) {
  25                 super(exception);
  26                 if (log.isDebugEnabled())
  27                         log.error("Exception chain", exception);
  28         }
  29
  30         public String toJsonString(ObjectMapper objectMapper) {
  31                 try {
  32                         return objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(this);
  33                 } catch (JsonProcessingException e) {
  34                         throw new IllegalStateException("Cannot write system exceptions " + toString(), e);
  35                 }
  36         }
  37
  38         public void writeAsJson(ObjectMapper objectMapper, Writer writer) {
  39                 try {
  40                         JsonGenerator jg = objectMapper.writerWithDefaultPrettyPrinter().getFactory().createGenerator(writer);
  41                         jg.writeObject(this);
  42                 } catch (IOException e) {
  43                         throw new IllegalStateException("Cannot write system exceptions " + toString(), e);
  44                 }
  45         }
  46
  47         public void writeAsJson(ObjectMapper objectMapper, HttpServletResponse resp) {
  48                 try {
  49                         resp.setContentType("application/json");
  50                         resp.setStatus(500);
  51                         writeAsJson(objectMapper, resp.getWriter());
  52                 } catch (IOException e) {
  53                         throw new IllegalStateException("Cannot write system exceptions " + toString(), e);
  54                 }
  55         }
  56
  57 //      public static void main(String[] args) throws Exception {
  58 //              try {
  59 //                      try {
  60 //                              try {
  61 //                                      testDeeper();
  62 //                              } catch (Exception e) {
  63 //                                      throw new Exception("Less deep exception", e);
  64 //                              }
  65 //                      } catch (Exception e) {
  66 //                              throw new RuntimeException("Top exception", e);
  67 //                      }
  68 //              } catch (Exception e) {
  69 //                      CmsExceptionsChain vjeSystemErrors = new CmsExceptionsChain(e);
  70 //                      ObjectMapper objectMapper = new ObjectMapper();
  71 //                      System.out.println(objectMapper.writerWithDefaultPrettyPrinter().writeValueAsString(vjeSystemErrors));
  72 //                      e.printStackTrace();
  73 //              }
  74 //      }
  75 //
  76 //      static void testDeeper() throws Exception {
  77 //              throw new IllegalStateException("Deep exception");
  78 //      }
  79
  80 }