parthchandra commented on code in PR #4309:
URL: https://github.com/apache/datafusion-comet/pull/4309#discussion_r3305515416
##########
spark/src/main/scala/org/apache/comet/rules/CometScanRule.scala:
##########
@@ -367,12 +367,13 @@ case class CometScanRule(session: SparkSession)
val hadoopDerivedProperties =
CometIcebergNativeScan.hadoopToIcebergS3Properties(hadoopS3Options)
- // Extract vended credentials from FileIO (REST catalog credential
vending).
- // FileIO properties take precedence over Hadoop-derived
properties because
- // they contain per-table credentials vended by the REST catalog.
+ // Forward the full FileIO property bag (including
credentials.uri, OAuth tokens,
Review Comment:
Oh right. Probably worth adding a documentation note that
`spark.network.crypto.enabled` should be set to `true`
##########
spark/src/main/java/org/apache/comet/cloud/s3/CometS3CredentialDispatcher.java:
##########
@@ -0,0 +1,205 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.apache.comet.cloud.s3;
+
+import java.lang.reflect.InvocationTargetException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.atomic.AtomicLong;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import org.apache.comet.util.ClassLoaders;
+
+/**
+ * JNI entry point that resolves a {@link CometS3CredentialProvider} for
native code.
+ *
+ * <p>{@link #ensureInitialized} reflects the named class, runs {@code
initialize(Map)} once, and
+ * returns a {@code long} handle. {@link #getCredentialsForPath} takes that
handle on every
+ * per-request call. See the design notes in the contributor guide for why the
SPI is shaped this
+ * way (keying, multi-tenant isolation, shutdown lifecycle).
+ */
+public final class CometS3CredentialDispatcher {
+
+ private static final Logger LOG =
LoggerFactory.getLogger(CometS3CredentialDispatcher.class);
+
+ private static final ConcurrentHashMap<InstanceKey, Long> KEY_TO_HANDLE =
+ new ConcurrentHashMap<>();
+ private static final ConcurrentHashMap<Long, RegisteredProvider> INSTANCES =
+ new ConcurrentHashMap<>();
+ private static final AtomicLong HANDLE_SEQ = new AtomicLong(1L);
+ private static final CometS3AccessMode[] MODES = CometS3AccessMode.values();
+
+ static {
+ Runtime.getRuntime()
+ .addShutdownHook(
+ new Thread(CometS3CredentialDispatcher::closeAll,
"comet-s3-credential-shutdown"));
+ }
+
+ private CometS3CredentialDispatcher() {}
+
+ /**
+ * Reflects and initializes the named provider on first call for the {@code
(FQCN, dispatchKey,
+ * catalogProperties)} triple, and returns a handle reused by subsequent
{@link
+ * #getCredentialsForPath} calls.
+ */
+ public static long ensureInitialized(
+ String providerClassName, String dispatchKey, Map<String, String>
catalogProperties) {
+ if (providerClassName == null || providerClassName.isEmpty()) {
+ throw new IllegalArgumentException(
+ "providerClassName is empty; native side should not call without a
configured class");
+ }
+ Map<String, String> snapshot =
+ catalogProperties == null
+ ? Collections.emptyMap()
+ : Collections.unmodifiableMap(new HashMap<>(catalogProperties));
+ InstanceKey key =
+ new InstanceKey(providerClassName, dispatchKey == null ? "" :
dispatchKey, snapshot);
+ return KEY_TO_HANDLE.computeIfAbsent(
+ key,
+ k -> {
+ CometS3CredentialProvider provider =
instantiate(k.providerClassName);
+ provider.initialize(k.catalogProperties);
+ long handle = HANDLE_SEQ.getAndIncrement();
+ INSTANCES.put(handle, new RegisteredProvider(provider, k));
+ return handle;
+ });
+ }
+
+ /**
+ * Invoked by native code on every per-request credential fetch. {@code
handle} must be a value
+ * returned by a prior {@link #ensureInitialized} call; otherwise this
throws. {@code mode} is the
+ * {@link CometS3AccessMode} ordinal.
+ */
+ public static CometS3Credentials getCredentialsForPath(
+ long handle, String bucket, String path, int mode) throws Exception {
+ if (mode < 0 || mode >= MODES.length) {
+ throw new IllegalArgumentException("Invalid CometS3AccessMode ordinal: "
+ mode);
+ }
+ RegisteredProvider registered = INSTANCES.get(handle);
+ if (registered == null) {
+ throw new IllegalStateException(
+ "CometS3CredentialProvider handle "
+ + handle
+ + " was not initialized; "
+ + "ensureInitialized must be called before
getCredentialsForPath");
+ }
+ CometS3AccessMode accessMode = MODES[mode];
+ if (LOG.isDebugEnabled()) {
+ LOG.debug(
+ "Fetching credentials via {} (dispatchKey={}, handle={}) for
bucket={} path={} mode={}",
+ registered.key.providerClassName,
+ registered.key.dispatchKey,
+ handle,
+ bucket,
+ path,
+ accessMode);
+ }
+ return registered.provider.getCredentialsForPath(
+ new CometS3CredentialContext(bucket, path, accessMode));
+ }
+
+ private static CometS3CredentialProvider instantiate(String
providerClassName) {
+ Class<?> clazz;
+ try {
+ clazz = ClassLoaders.loadClass(providerClassName);
+ } catch (ClassNotFoundException e) {
+ throw new IllegalStateException(
+ "CometS3CredentialProvider class not found: "
+ + providerClassName
+ + ". Ensure the vendor JAR is on the executor classpath.",
+ e);
+ }
+ if (!CometS3CredentialProvider.class.isAssignableFrom(clazz)) {
+ throw new IllegalStateException(
+ providerClassName + " does not implement " +
CometS3CredentialProvider.class.getName());
+ }
+ try {
+ Object instance = clazz.getDeclaredConstructor().newInstance();
+ LOG.info("Instantiated CometS3CredentialProvider {}", providerClassName);
+ return (CometS3CredentialProvider) instance;
+ } catch (NoSuchMethodException e) {
+ throw new IllegalStateException(
+ providerClassName + " must declare a public no-arg constructor", e);
+ } catch (InstantiationException | IllegalAccessException |
InvocationTargetException e) {
+ throw new IllegalStateException(
+ "Failed to instantiate CometS3CredentialProvider " +
providerClassName, e);
+ }
+ }
+
+ /** Visible for tests; otherwise invoked from the JVM shutdown hook. */
+ static void closeAll() {
+ for (RegisteredProvider registered : INSTANCES.values()) {
+ try {
+ registered.provider.close();
+ } catch (Throwable t) {
+ LOG.warn(
+ "Exception from {} (dispatchKey={}).close() during shutdown",
+ registered.key.providerClassName,
+ registered.key.dispatchKey,
+ t);
+ }
+ }
+ INSTANCES.clear();
+ KEY_TO_HANDLE.clear();
+ }
+
+ private static final class InstanceKey {
+ final String providerClassName;
+ final String dispatchKey;
+ final Map<String, String> catalogProperties;
Review Comment:
Let's have a followup for this. My knowledge of this is theoretical but
https://gravitino.apache.org/docs/0.9.0-incubating/security/credential-vending
can return per table credentials by creating 'Assume Role' credentials scoped
to the table.
This is similar to having per file encryption is PME; access to specific
files/tables can be restricted for users.
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