adutra commented on code in PR #8857:
URL: https://github.com/apache/iceberg/pull/8857#discussion_r1370572856
##########
nessie/src/main/java/org/apache/iceberg/nessie/NessieIcebergClient.java:
##########
@@ -181,133 +185,223 @@ public IcebergTable table(TableIdentifier
tableIdentifier) {
}
public void createNamespace(Namespace namespace, Map<String, String>
metadata) {
+ getRef().checkMutable();
+
+ if (namespace.isEmpty()) {
+ throw new IllegalArgumentException("Creating empty namespaces is not
supported");
+ }
+
+ ContentKey key = ContentKey.of(namespace.levels());
+ org.projectnessie.model.Namespace content =
+ org.projectnessie.model.Namespace.of(key.getElements(), metadata);
+
try {
- getRef().checkMutable();
- withReference(
- getApi()
- .createNamespace()
-
.namespace(org.projectnessie.model.Namespace.of(namespace.levels()))
- .properties(metadata))
- .create();
- refresh();
- } catch (NessieNamespaceAlreadyExistsException e) {
- throw new AlreadyExistsException(e, "Namespace already exists: %s",
namespace);
+
+ Map<ContentKey, Content> contentMap =
+ api.getContent().reference(getReference()).key(key).get();
+ Content existing = contentMap.get(key);
+ if (existing != null) {
+ throw namespaceAlreadyExists(key, existing, null);
+ }
+
+ try {
+
+ commitRetry("create namespace " + key, Operation.Put.of(key, content));
+
+ } catch (NessieReferenceConflictException e) {
+
+ NessieConflictHandler.handleSingle(
+ e,
+ (conflictType, contentKey) -> {
+ switch (conflictType) {
+ case KEY_EXISTS:
+ Content conflicting =
+
withReference(api.getContent()).key(contentKey).get().get(contentKey);
+ throw namespaceAlreadyExists(contentKey, conflicting, e);
+ case NAMESPACE_ABSENT:
+ throw new NoSuchNamespaceException(
+ e,
+ "Cannot create Namespace '%s': parent namespace '%s'
does not exist",
+ namespace,
+ contentKey);
+ default:
+ return false;
+ }
+ });
+ throw new RuntimeException(
+ String.format("Cannot create Namespace '%s': %s", namespace,
e.getMessage()));
+ }
+
} catch (NessieNotFoundException e) {
throw new RuntimeException(
String.format(
- "Cannot create Namespace '%s': " + "ref '%s' is no longer
valid.",
+ "Cannot create Namespace '%s': ref '%s' is no longer valid.",
namespace, getRef().getName()),
e);
+ } catch (BaseNessieClientServerException e) {
+ throw new RuntimeException(
+ String.format("Cannot create Namespace '%s': %s", namespace,
e.getMessage()), e);
}
}
public List<Namespace> listNamespaces(Namespace namespace) throws
NoSuchNamespaceException {
+
try {
- GetNamespacesResponse response =
- withReference(
- getApi()
- .getMultipleNamespaces()
-
.namespace(org.projectnessie.model.Namespace.of(namespace.levels())))
- .get();
- return response.getNamespaces().stream()
- .map(ns -> Namespace.of(ns.getElements().toArray(new String[0])))
- .filter(ns -> ns.length() == namespace.length() + 1)
+
+ org.projectnessie.model.Namespace root =
+ org.projectnessie.model.Namespace.of(namespace.levels());
+
+ String filter =
+ namespace.isEmpty()
+ ? "size(entry.keyElements) == 1"
+ : String.format(
+ "size(entry.keyElements) == %d &&
entry.encodedKey.startsWith('%s.')",
+ root.getElementCount() + 1, root.name());
+
+ List<ContentKey> entries =
+ withReference(api.getEntries()).filter(filter).stream()
+ .filter(e -> Content.Type.NAMESPACE.equals(e.getType()))
+ .map(EntriesResponse.Entry::getName)
+ .collect(Collectors.toList());
+
+ if (entries.isEmpty()) {
+ return Collections.emptyList();
+ }
+
+ GetContentBuilder getContent = withReference(api.getContent());
+ entries.forEach(getContent::key);
+
+ return getContent.get().values().stream()
+ .map(v -> v.unwrap(org.projectnessie.model.Namespace.class))
+ .filter(Optional::isPresent)
+ .map(Optional::get)
+ .map(v -> Namespace.of(v.getElements().toArray(new String[0])))
+ .filter(v -> v.length() == namespace.length() + 1) // only direct
children
.collect(Collectors.toList());
- } catch (NessieReferenceNotFoundException e) {
+
+ } catch (NessieNotFoundException e) {
throw new RuntimeException(
String.format(
- "Cannot list Namespaces starting from '%s': " + "ref '%s' is no
longer valid.",
+ "Cannot list Namespaces starting from '%s': ref '%s' is no
longer valid.",
namespace, getRef().getName()),
e);
}
}
public boolean dropNamespace(Namespace namespace) throws
NamespaceNotEmptyException {
+
+ getRef().checkMutable();
+ ContentKey key = ContentKey.of(namespace.levels());
+
try {
- getRef().checkMutable();
- withReference(
- getApi()
- .deleteNamespace()
-
.namespace(org.projectnessie.model.Namespace.of(namespace.levels())))
- .delete();
- refresh();
+
+ commitRetry("drop namespace " + key, Operation.Delete.of(key));
return true;
- } catch (NessieNamespaceNotFoundException e) {
- return false;
+
+ } catch (NessieReferenceConflictException e) {
+
+ if (!NessieConflictHandler.handleSingle(
+ e,
+ (conflictType, contentKey) -> {
+ switch (conflictType) {
+ case KEY_DOES_NOT_EXIST:
+ return true; // OK, continue
+ case NAMESPACE_NOT_EMPTY:
+ throw new NamespaceNotEmptyException(e, "Namespace '%s' is not
empty.", namespace);
+ }
+ return false;
+ })) {
+ throw new RuntimeException(
+ String.format("Cannot drop Namespace '%s': %s", namespace,
e.getMessage()));
+ }
+
} catch (NessieNotFoundException e) {
LOG.error(
"Cannot drop Namespace '{}': ref '{}' is no longer valid.",
namespace,
getRef().getName(),
e);
- return false;
- } catch (NessieNamespaceNotEmptyException e) {
- throw new NamespaceNotEmptyException(
- e, "Namespace '%s' is not empty. One or more tables exist.",
namespace);
+ } catch (BaseNessieClientServerException e) {
+ throw new RuntimeException(
+ String.format("Cannot drop Namespace '%s': %s", namespace,
e.getMessage()), e);
}
+ return false;
}
public Map<String, String> loadNamespaceMetadata(Namespace namespace)
throws NoSuchNamespaceException {
+ ContentKey key = ContentKey.of(namespace.levels());
try {
- return withReference(
- getApi()
- .getNamespace()
-
.namespace(org.projectnessie.model.Namespace.of(namespace.levels())))
- .get()
- .getProperties();
- } catch (NessieNamespaceNotFoundException e) {
- throw new NoSuchNamespaceException(e, "Namespace does not exist: %s",
namespace);
- } catch (NessieReferenceNotFoundException e) {
+ Map<ContentKey, Content> contentMap =
withReference(api.getContent()).key(key).get();
+ Content existing = contentMap.get(key);
+ if (!(existing instanceof org.projectnessie.model.Namespace)) {
+ throw new NoSuchNamespaceException("Namespace does not exist: %s",
namespace);
+ }
+ return ((org.projectnessie.model.Namespace) existing).getProperties();
+ } catch (NessieNotFoundException e) {
throw new RuntimeException(
String.format(
- "Cannot load Namespace '%s': " + "ref '%s' is no longer valid.",
+ "Cannot load Namespace '%s': ref '%s' is no longer valid.",
namespace, getRef().getName()),
e);
}
}
public boolean setProperties(Namespace namespace, Map<String, String>
properties) {
- try {
- withReference(
- getApi()
- .updateProperties()
-
.namespace(org.projectnessie.model.Namespace.of(namespace.levels()))
- .updateProperties(properties))
- .update();
- refresh();
- // always successful, otherwise an exception is thrown
- return true;
- } catch (NessieNamespaceNotFoundException e) {
- throw new NoSuchNamespaceException(e, "Namespace does not exist: %s",
namespace);
- } catch (NessieNotFoundException e) {
- throw new RuntimeException(
- String.format(
- "Cannot update properties on Namespace '%s': ref '%s' is no
longer valid.",
- namespace, getRef().getName()),
- e);
- }
+ return updateProperties(namespace, props -> props.putAll(properties));
}
public boolean removeProperties(Namespace namespace, Set<String> properties)
{
+ return updateProperties(namespace, props ->
props.keySet().removeAll(properties));
+ }
+
+ private boolean updateProperties(Namespace namespace, Consumer<Map<String,
String>> action) {
+ getRef().checkMutable();
+ ContentKey key = ContentKey.of(namespace.levels());
+
try {
- withReference(
- getApi()
- .updateProperties()
-
.namespace(org.projectnessie.model.Namespace.of(namespace.levels()))
- .removeProperties(properties))
- .update();
- refresh();
+
+ Map<ContentKey, Content> contentMap =
+ api.getContent().reference(getReference()).key(key).get();
Review Comment:
> the commit to update Namespace properties should set the "expected hash"
to the value that was used for loading the properties before the modification.
Isn't that being done already? `.reference(getReference())` is the same as
`.refName(getReference().getName()).hashOnRef(getReference().getHash())`.
> Every time the (local) HEAD advances we have to reload the namespace
properties from the Nessie server and re-apply changes.
I'm not sure it's necessary? If the remote head of the branch has moved,
either there is a conflict, in which case we don't retry and the method will
throw; or there is no conflict, in which case the first cmmit attempt will
succeed. These methods don't return the modified namespace btw, only a boolean;
so I don't see why we need to reload the namespace content between each retry.
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