/**
* Executors are only closed if they were not supplied externally in the {@link
* org.apache.tinkerpop.gremlin.groovy.engine.GremlinExecutor.Builder}
*/
public CompletableFuture<Void> closeAsync() throws Exception {
final CompletableFuture<Void> future = new CompletableFuture<>();
new Thread(
() -> {
// leave pools running if they are supplied externally. let the sender be responsible
// for shutting them down
if (!suppliedExecutor) {
executorService.shutdown();
try {
if (!executorService.awaitTermination(180000, TimeUnit.MILLISECONDS))
logger.warn(
"Timeout while waiting for ExecutorService of GremlinExecutor to shutdown.");
} catch (InterruptedException ie) {
logger.warn(
"ExecutorService on GremlinExecutor may not have shutdown properly as shutdown thread terminated early.");
}
}
// calls to shutdown are idempotent so no problems calling it twice if the pool is
// shared
if (!suppliedScheduledExecutor) {
scheduledExecutorService.shutdown();
try {
if (!scheduledExecutorService.awaitTermination(180000, TimeUnit.MILLISECONDS))
logger.warn(
"Timeout while waiting for ScheduledExecutorService of GremlinExecutor to shutdown.");
} catch (InterruptedException ie) {
logger.warn(
"ScheduledExecutorService on GremlinExecutor may not have shutdown properly as shutdown thread terminated early.");
}
}
try {
scriptEngines.close();
} catch (Exception ex) {
logger.warn(
"Error while shutting down the ScriptEngines in the GremlinExecutor", ex);
}
future.complete(null);
},
"gremlin-executor-close")
.start();
return future;
}
