nastra commented on code in PR #10459:
URL: https://github.com/apache/iceberg/pull/10459#discussion_r1631956569
##########
core/src/test/java/org/apache/iceberg/TestCatalogUtil.java:
##########
@@ -249,6 +253,50 @@ public void fullTableNameWithDifferentValues() {
.isEqualTo(pathStyleCatalogName + "/" + nameSpaceWithTwoLevels + "." +
tableName);
}
+ @Test
+ public void testLoadMetricsReporterFromThreadContextClassLoader() throws
Exception {
+ URL jarUrl =
+ getClass()
+ .getClassLoader()
+
.getResource("com/example/target/custom-metrics-reporter-1.0-SNAPSHOT.jar");
+ Assertions.assertThat(jarUrl).isNotNull();
+ ClassLoader customClassLoader =
+ new URLClassLoader(new URL[] {jarUrl},
ClassLoader.getSystemClassLoader());
+ Map<String, String> properties = new HashMap<>();
+ properties.put(CatalogProperties.METRICS_REPORTER_IMPL,
"com.example.CustomMetricsReporter");
+
+ // Temporarily change the context class loader to the custom class loader
+ ClassLoader originalContextClassLoader =
Thread.currentThread().getContextClassLoader();
+ try {
+ try {
+ CatalogUtil.loadMetricsReporter(properties);
+ Assertions.fail("Expected to throw IllegalArgumentException");
+ } catch (IllegalArgumentException e) {
+ Assertions.assertThat(e.getMessage()).contains("Cannot initialize
MetricsReporter");
+ }
+ Thread.currentThread().setContextClassLoader(customClassLoader);
+ MetricsReporter reporter = CatalogUtil.loadMetricsReporter(properties);
+
+ Assertions.assertThat(reporter).isNotNull();
Review Comment:
```suggestion
Assertions.assertThat(reporter).isNotNull().isInstanceOf(MetricsReporter.class);
```
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