paul-rogers commented on a change in pull request #1999: DRILL-7582: Moved
Drillbits REST API communication to the back end layer
URL: https://github.com/apache/drill/pull/1999#discussion_r384877484
##########
File path:
exec/java-exec/src/main/java/org/apache/drill/exec/server/rest/WebUtils.java
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@@ -48,4 +68,87 @@ public static String generateCsrfToken() {
new SecureRandom().nextBytes(buffer);
return Base64.getUrlEncoder().withoutPadding().encodeToString(buffer);
}
+
+ /**
+ * Build an URL of a remote Drillbit endpoint.
+ *
+ * @param work {@link WorkManager} instance needed to retrieve the Drillbit
address.
+ * @param request {@link HttpServletRequest} instance needed to to set the
URL schema.
+ * @param hostname hostname of the Drillbit.
+ * @param path relative path to the endpoint.
+ * @return remote Drillbit endpoint URL.
+ * @throws RuntimeException if there is no Drillbit at the given hostname.
+ */
+ static URL getDrillbitURL(WorkManager work, HttpServletRequest request,
String hostname, String path) {
+ DrillbitEndpoint drillbit = work.getContext().getAvailableBits().stream()
+ .filter(db -> db.getAddress().equals(hostname))
+ .findAny()
+ .orElse(null);
+ if (drillbit == null) {
Review comment:
This is a programming invariant check. Maybe use wither `assert` or
`Preconditions`.
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