Exemple #1
0
  /**
   * Prepares the mediator for the invocation of an external script
   *
   * @param synCtx MessageContext script
   * @throws ScriptException For any errors , when compile the script
   */
  protected synchronized void prepareExternalScript(MessageContext synCtx) throws ScriptException {

    // TODO: only need this synchronized method for dynamic registry entries. If there was a way
    // to access the registry entry during mediator initialization then for non-dynamic entries
    // this could be done just the once during mediator initialization.

    // Derive actual key from xpath expression or get static key
    String generatedScriptKey = key.evaluateValue(synCtx);
    Entry entry = synCtx.getConfiguration().getEntryDefinition(generatedScriptKey);
    boolean needsReload =
        (entry != null) && entry.isDynamic() && (!entry.isCached() || entry.isExpired());
    synchronized (resourceLock) {
      if (scriptSourceCode == null || needsReload) {
        Object o = synCtx.getEntry(generatedScriptKey);
        if (o instanceof OMElement) {
          scriptSourceCode = ((OMElement) (o)).getText();
          scriptEngine.eval(scriptSourceCode);
        } else if (o instanceof String) {
          scriptSourceCode = (String) o;
          scriptEngine.eval(scriptSourceCode);
        } else if (o instanceof OMText) {

          DataHandler dataHandler = (DataHandler) ((OMText) o).getDataHandler();
          if (dataHandler != null) {
            BufferedReader reader = null;
            try {
              reader = new BufferedReader(new InputStreamReader(dataHandler.getInputStream()));
              scriptEngine.eval(reader);

            } catch (IOException e) {
              handleException("Error in reading script as a stream ", e, synCtx);
            } finally {

              if (reader != null) {
                try {
                  reader.close();
                } catch (IOException e) {
                  handleException("Error in closing input stream ", e, synCtx);
                }
              }
            }
          }
        }
      }
    }

    // load <include /> scripts; reload each script if needed
    for (Value includeKey : includes.keySet()) {

      String includeSourceCode = (String) includes.get(includeKey);

      String generatedKey = includeKey.evaluateValue(synCtx);

      Entry includeEntry = synCtx.getConfiguration().getEntryDefinition(generatedKey);
      boolean includeEntryNeedsReload =
          (includeEntry != null)
              && includeEntry.isDynamic()
              && (!includeEntry.isCached() || includeEntry.isExpired());
      synchronized (resourceLock) {
        if (includeSourceCode == null || includeEntryNeedsReload) {
          log.debug("Re-/Loading the include script with key " + includeKey);
          Object o = synCtx.getEntry(generatedKey);
          if (o instanceof OMElement) {
            includeSourceCode = ((OMElement) (o)).getText();
            scriptEngine.eval(includeSourceCode);
          } else if (o instanceof String) {
            includeSourceCode = (String) o;
            scriptEngine.eval(includeSourceCode);
          } else if (o instanceof OMText) {

            DataHandler dataHandler = (DataHandler) ((OMText) o).getDataHandler();
            if (dataHandler != null) {
              BufferedReader reader = null;
              try {
                reader = new BufferedReader(new InputStreamReader(dataHandler.getInputStream()));
                scriptEngine.eval(reader);

              } catch (IOException e) {
                handleException("Error in reading script as a stream ", e, synCtx);
              } finally {

                if (reader != null) {
                  try {
                    reader.close();
                  } catch (IOException e) {
                    handleException("Error in closing input" + " stream ", e, synCtx);
                  }
                }
              }
            }
          }
        }
      }
    }
  }