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new 155a9bf async/await draft post (additional refinements)
155a9bf is described below
commit 155a9bfe42a7a5b7a028971384e5c1a1c0c42366
Author: Paul King <[email protected]>
AuthorDate: Thu Mar 26 13:26:37 2026 +1000
async/await draft post (additional refinements)
---
site/src/site/blog/groovy-async-await.adoc | 27 +++++++++++++++++++++++----
1 file changed, 23 insertions(+), 4 deletions(-)
diff --git a/site/src/site/blog/groovy-async-await.adoc
b/site/src/site/blog/groovy-async-await.adoc
index 02c17e9..8433f7d 100644
--- a/site/src/site/blog/groovy-async-await.adoc
+++ b/site/src/site/blog/groovy-async-await.adoc
@@ -111,10 +111,29 @@ async Quest loadHeroQuest(String loginToken) {
----
Variables are declared at the point of use. The return value is
-obvious. No callbacks, no lambdas, no chained combinators. Standard
-`try`/`catch` works — and `await` automatically unwraps
-`CompletionException`, so you catch the _original_ exception type,
-not a wrapper.
+obvious. No callbacks, no lambdas, no chained combinators.
+
+What about the `.exceptionally(e -> Quest.DEFAULT)` fallback from
+the Java version? With `async`/`await`, it's just a `try`/`catch`:
+
+[source,groovy]
+----
+async Quest loadHeroQuest(String loginToken) {
+ try {
+ var heroId = await lookupHeroId(loginToken)
+ var heroClass = await fetchHeroClass(heroId)
+ return await loadActiveQuest(heroClass)
+ } catch (NoActiveQuestException e) {
+ return Quest.DEFAULT
+ }
+}
+----
+
+`await` automatically unwraps `CompletionException`, so you catch
+the _original_ exception type — `NoActiveQuestException` here, not
+a `CompletionException` wrapper. Error handling reads exactly like
+synchronous code — no separate `.exceptionally()` callback bolted
+on at the end of a chain.
== Example 2: preparing for battle — fetch once, await together
