public static void renderException(XContentBuilder builder, Params params, Exception e)
throws IOException {
builder.startObject("error");
final ElasticsearchException[] rootCauses = ElasticsearchException.guessRootCauses(e);
builder.field("root_cause");
builder.startArray();
for (ElasticsearchException rootCause : rootCauses) {
builder.startObject();
rootCause.toXContent(
builder,
new ToXContent.DelegatingMapParams(
Collections.singletonMap(ElasticsearchException.REST_EXCEPTION_SKIP_CAUSE, "true"),
params));
builder.endObject();
}
builder.endArray();
ElasticsearchException.toXContent(builder, params, e);
builder.endObject();
}
/** Renders a cause exception as xcontent */
protected void causeToXContent(XContentBuilder builder, Params params) throws IOException {
final Throwable cause = getCause();
if (cause != null
&& params.paramAsBoolean(REST_EXCEPTION_SKIP_CAUSE, REST_EXCEPTION_SKIP_CAUSE_DEFAULT)
== false) {
builder.field("caused_by");
builder.startObject();
toXContent(builder, params, cause);
builder.endObject();
}
}
/**
* Statis toXContent helper method that also renders non {@link
* org.elasticsearch.ElasticsearchException} instances as XContent.
*/
public static void toXContent(XContentBuilder builder, Params params, Throwable ex)
throws IOException {
ex = ExceptionsHelper.unwrapCause(ex);
if (ex instanceof ElasticsearchException) {
((ElasticsearchException) ex).toXContent(builder, params);
} else {
builder.field("type", getExceptionName(ex));
builder.field("reason", ex.getMessage());
if (ex.getCause() != null) {
builder.field("caused_by");
builder.startObject();
toXContent(builder, params, ex.getCause());
builder.endObject();
}
if (params.paramAsBoolean(
REST_EXCEPTION_SKIP_STACK_TRACE, REST_EXCEPTION_SKIP_STACK_TRACE_DEFAULT)
== false) {
builder.field("stack_trace", ExceptionsHelper.stackTrace(ex));
}
}
}
@Override
public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
Throwable ex = ExceptionsHelper.unwrapCause(this);
if (ex != this) {
toXContent(builder, params, this);
} else {
builder.field("type", getExceptionName());
builder.field("reason", getMessage());
for (String key : headers.keySet()) {
if (key.startsWith("es.")) {
List<String> values = headers.get(key);
xContentHeader(builder, key.substring("es.".length()), values);
}
}
innerToXContent(builder, params);
renderHeader(builder, params);
if (params.paramAsBoolean(
REST_EXCEPTION_SKIP_STACK_TRACE, REST_EXCEPTION_SKIP_STACK_TRACE_DEFAULT)
== false) {
builder.field("stack_trace", ExceptionsHelper.stackTrace(this));
}
}
return builder;
}