How to use

emptyIfNull

method

in

jetbrains.buildServer.util.StringUtil

public static boolean isCommonExternalError(@Nullable Throwable e) {
 if (e == null) return false;
 final String message = jetbrains.buildServer.util.StringUtil.emptyIfNull(e.getMessage());
 if (e.getClass().getName().endsWith(".IllegalStateException") && message.equals("Cannot call sendError() after the response has been committed")){
  //Jersey 1.19 (as opposed to Jersey 1.16) reports this error in case of ClientAbortException
  return true;
 }
 if (e.getClass().getName().endsWith(".IllegalStateException") && message.equals("getOutputStream() has already been called for this response")){
  //this is thrown on attempt to report error in already written response in APIController.reportRestErrorResponse()
  return true;
 }
 while (true) {
  if (e.getClass().getName().endsWith(".ClientAbortException")) return true;
  final Throwable cause = e.getCause();
  if (cause == null || cause == e) break;
  e = cause;
 }
 return false;
}

@NotNull
private String getPatternsForBuild(@NotNull final BuildCleanupContext cleanupContext, @NotNull final SBuild build) {
 if (cleanupContext.getCleanupLevel().isCleanHistoryEntry()) return StringUtil.EMPTY;
 final CleanupPolicy policy = cleanupContext.getCleanupPolicyForBuild(build.getBuildId());
 return StringUtil.emptyIfNull(policy.getParameters().get(HistoryRetentionPolicy.ARTIFACT_PATTERNS_PARAM));
}