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javademos/docs/output/82-structured-not-final.txt
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# StructuredTaskScope (JEP 505 in 25). Fifth preview in 25, sixth in 26, seventh in 27.
$ javac StructuredHub.java (JDK 25, no flag)
<repo>/lanes/src/StructuredHub.java:1: error: StructuredTaskScope is a preview API and is disabled by default.
import java.util.concurrent.StructuredTaskScope;
^
(use --enable-preview to enable preview APIs)
<repo>/lanes/src/StructuredHub.java:15: error: StructuredTaskScope is a preview API and is disabled by default.
try (var scope = StructuredTaskScope.open()) {
^
(use --enable-preview to enable preview APIs)
<repo>/lanes/src/StructuredHub.java:24: error: StructuredTaskScope is a preview API and is disabled by default.
try (var scope = StructuredTaskScope.open(StructuredTaskScope.Joiner.<String>anySuccessfulResultOrThrow())) {
^
(use --enable-preview to enable preview APIs)
<repo>/lanes/src/StructuredHub.java:24: error: Joiner is a preview API and is disabled by default.
try (var scope = StructuredTaskScope.open(StructuredTaskScope.Joiner.<String>anySuccessfulResultOrThrow())) {
^
(use --enable-preview to enable preview APIs)
<repo>/lanes/src/StructuredHub.java:24: error: StructuredTaskScope is a preview API and is disabled by default.
try (var scope = StructuredTaskScope.open(StructuredTaskScope.Joiner.<String>anySuccessfulResultOrThrow())) {
^
(use --enable-preview to enable preview APIs)
5 errors
exit=1
$ javac --enable-preview --release 25 StructuredHub.java (JDK 25)
exit=0
$ java --enable-preview StructuredHub (JDK 25)
java.version = 25.0.4.1
CHECK ok : fan-out: both results joined: Dashboard[user=user-7, order=order-for-7]
CHECK ok : anySuccessfulResultOrThrow(): the first result wins and the slow subtask is cancelled
$ javac StructuredHub.java (JDK 26, no flag)
<repo>/lanes/src/StructuredHub.java:1: error: StructuredTaskScope is a preview API and is disabled by default.
import java.util.concurrent.StructuredTaskScope;
^
(use --enable-preview to enable preview APIs)
<repo>/lanes/src/StructuredHub.java:15: error: StructuredTaskScope is a preview API and is disabled by default.
try (var scope = StructuredTaskScope.open()) {
^
(use --enable-preview to enable preview APIs)
<repo>/lanes/src/StructuredHub.java:24: error: StructuredTaskScope is a preview API and is disabled by default.
try (var scope = StructuredTaskScope.open(StructuredTaskScope.Joiner.<String>anySuccessfulResultOrThrow())) {
^
(use --enable-preview to enable preview APIs)
<repo>/lanes/src/StructuredHub.java:24: error: Joiner is a preview API and is disabled by default.
try (var scope = StructuredTaskScope.open(StructuredTaskScope.Joiner.<String>anySuccessfulResultOrThrow())) {
^
(use --enable-preview to enable preview APIs)
<repo>/lanes/src/StructuredHub.java:24: error: cannot find symbol
try (var scope = StructuredTaskScope.open(StructuredTaskScope.Joiner.<String>anySuccessfulResultOrThrow())) {
^
symbol: method <String>anySuccessfulResultOrThrow()
location: interface Joiner
<repo>/lanes/src/StructuredHub.java:24: error: StructuredTaskScope is a preview API and is disabled by default.
try (var scope = StructuredTaskScope.open(StructuredTaskScope.Joiner.<String>anySuccessfulResultOrThrow())) {
^
(use --enable-preview to enable preview APIs)
6 errors
exit=1
$ javac --enable-preview --release 26 StructuredHub.java (JDK 26)
<repo>/lanes/src/StructuredHub.java:24: error: cannot find symbol
try (var scope = StructuredTaskScope.open(StructuredTaskScope.Joiner.<String>anySuccessfulResultOrThrow())) {
^
symbol: method <String>anySuccessfulResultOrThrow()
location: interface Joiner
1 error
exit=1
$ javac StructuredHub.java (JDK 27, no flag)
<repo>/lanes/src/StructuredHub.java:1: error: StructuredTaskScope is a preview API and is disabled by default.
import java.util.concurrent.StructuredTaskScope;
^
(use --enable-preview to enable preview APIs)
<repo>/lanes/src/StructuredHub.java:15: error: StructuredTaskScope is a preview API and is disabled by default.
try (var scope = StructuredTaskScope.open()) {
^
(use --enable-preview to enable preview APIs)
<repo>/lanes/src/StructuredHub.java:24: error: StructuredTaskScope is a preview API and is disabled by default.
try (var scope = StructuredTaskScope.open(StructuredTaskScope.Joiner.<String>anySuccessfulResultOrThrow())) {
^
(use --enable-preview to enable preview APIs)
<repo>/lanes/src/StructuredHub.java:24: error: Joiner is a preview API and is disabled by default.
try (var scope = StructuredTaskScope.open(StructuredTaskScope.Joiner.<String>anySuccessfulResultOrThrow())) {
^
(use --enable-preview to enable preview APIs)
<repo>/lanes/src/StructuredHub.java:24: error: cannot find symbol
try (var scope = StructuredTaskScope.open(StructuredTaskScope.Joiner.<String>anySuccessfulResultOrThrow())) {
^
symbol: method <String>anySuccessfulResultOrThrow()
location: interface Joiner
<repo>/lanes/src/StructuredHub.java:24: error: StructuredTaskScope is a preview API and is disabled by default.
try (var scope = StructuredTaskScope.open(StructuredTaskScope.Joiner.<String>anySuccessfulResultOrThrow())) {
^
(use --enable-preview to enable preview APIs)
6 errors
exit=1
$ javac --enable-preview --release 27 StructuredHub.java (JDK 27)
<repo>/lanes/src/StructuredHub.java:24: error: cannot find symbol
try (var scope = StructuredTaskScope.open(StructuredTaskScope.Joiner.<String>anySuccessfulResultOrThrow())) {
^
symbol: method <String>anySuccessfulResultOrThrow()
location: interface Joiner
1 error
exit=1
$ javac --enable-preview --release 26 StructuredHubNew.java (JDK 26)
exit=0
$ java --enable-preview StructuredHubNew (JDK 26)
java.version = 26.0.2.1
CHECK ok : anySuccessfulOrThrow(): the first result wins
$ javac --enable-preview --release 27 StructuredHubNew.java (JDK 27)
exit=0
$ java --enable-preview StructuredHubNew (JDK 27)
java.version = 27
CHECK ok : anySuccessfulOrThrow(): the first result wins
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