User-friendlier representation of a missing digest.

I moved it into DigestUtil preemptively in case we switch to binary instead of hex representation.

TESTED=manually
RELNOTES: None
PiperOrigin-RevId: 185007558

4 files changed, 12 insertions, 8 deletions

diff --git a/src/main/java/com/google/devtools/build/lib/remote/CacheNotFoundException.java b/src/main/java/com/google/devtools/build/lib/remote/CacheNotFoundException.java
index 15ff3ef3ad..2f9e0c3ed0 100644
--- a/src/main/java/com/google/devtools/build/lib/remote/CacheNotFoundException.java
+++ b/src/main/java/com/google/devtools/build/lib/remote/CacheNotFoundException.java
@@ -24,8 +24,8 @@ import java.io.IOException;
 public final class CacheNotFoundException extends IOException {
   private final Digest missingDigest;
 
-  CacheNotFoundException(Digest missingDigest) {
-    super("Missing digest: " + missingDigest);
+  CacheNotFoundException(Digest missingDigest, DigestUtil digestUtil) {
+    super("Missing digest: " + digestUtil.toString(missingDigest));
     this.missingDigest = missingDigest;
   }
 
diff --git a/src/main/java/com/google/devtools/build/lib/remote/DigestUtil.java b/src/main/java/com/google/devtools/build/lib/remote/DigestUtil.java
index 2ef23b54fa..d3c93bbde2 100644
--- a/src/main/java/com/google/devtools/build/lib/remote/DigestUtil.java
+++ b/src/main/java/com/google/devtools/build/lib/remote/DigestUtil.java
@@ -104,6 +104,10 @@ public class DigestUtil {
     return Digest.newBuilder().setHash(hexHash).setSizeBytes(size).build();
   }
 
+  public String toString(Digest digest) {
+    return digest.getHash() + "/" + digest.getSizeBytes();
+  }
+
   public static Digest getFromInputCache(ActionInput input, MetadataProvider cache)
       throws IOException {
     Metadata metadata = cache.getMetadata(input);
diff --git a/src/main/java/com/google/devtools/build/lib/remote/GrpcRemoteCache.java b/src/main/java/com/google/devtools/build/lib/remote/GrpcRemoteCache.java
index f0bc22b7b8..377c50d091 100644
--- a/src/main/java/com/google/devtools/build/lib/remote/GrpcRemoteCache.java
+++ b/src/main/java/com/google/devtools/build/lib/remote/GrpcRemoteCache.java
@@ -185,7 +185,7 @@ public class GrpcRemoteCache extends AbstractRemoteActionCache {
     if (!options.remoteInstanceName.isEmpty()) {
       resourceName += options.remoteInstanceName + "/";
     }
-    resourceName += "blobs/" + digest.getHash() + "/" + digest.getSizeBytes();
+    resourceName += "blobs/" + digestUtil.toString(digest);
     Iterator<ReadResponse> replies = bsBlockingStub()
         .read(ReadRequest.newBuilder().setResourceName(resourceName).build());
     while (replies.hasNext()) {
@@ -205,7 +205,7 @@ public class GrpcRemoteCache extends AbstractRemoteActionCache {
           });
     } catch (RetryException e) {
       if (RemoteRetrierUtils.causedByStatus(e, Status.Code.NOT_FOUND)) {
-        throw new CacheNotFoundException(digest);
+        throw new CacheNotFoundException(digest, digestUtil);
       }
       throw e;
     }
@@ -225,7 +225,7 @@ public class GrpcRemoteCache extends AbstractRemoteActionCache {
           });
     } catch (RetryException e) {
       if (RemoteRetrierUtils.causedByStatus(e, Status.Code.NOT_FOUND)) {
-        throw new CacheNotFoundException(digest);
+        throw new CacheNotFoundException(digest, digestUtil);
       }
       throw e;
     }
diff --git a/src/main/java/com/google/devtools/build/lib/remote/SimpleBlobStoreActionCache.java b/src/main/java/com/google/devtools/build/lib/remote/SimpleBlobStoreActionCache.java
index d9c67dce4a..21ad4489bb 100644
--- a/src/main/java/com/google/devtools/build/lib/remote/SimpleBlobStoreActionCache.java
+++ b/src/main/java/com/google/devtools/build/lib/remote/SimpleBlobStoreActionCache.java
@@ -196,7 +196,7 @@ public final class SimpleBlobStoreActionCache extends AbstractRemoteActionCache
     ByteArrayOutputStream out = new ByteArrayOutputStream();
     boolean success = blobStore.getActionResult(digest.getHash(), out);
     if (!success) {
-      throw new CacheNotFoundException(digest);
+      throw new CacheNotFoundException(digest, digestUtil);
     }
     return out.toByteArray();
   }
@@ -216,7 +216,7 @@ public final class SimpleBlobStoreActionCache extends AbstractRemoteActionCache
     try (OutputStream out = dest.getOutputStream()) {
       boolean success = blobStore.get(digest.getHash(), out);
       if (!success) {
-        throw new CacheNotFoundException(digest);
+        throw new CacheNotFoundException(digest, digestUtil);
       }
     }
   }
@@ -229,7 +229,7 @@ public final class SimpleBlobStoreActionCache extends AbstractRemoteActionCache
     try (ByteArrayOutputStream out = new ByteArrayOutputStream()) {
       boolean success = blobStore.get(digest.getHash(), out);
       if (!success) {
-        throw new CacheNotFoundException(digest);
+        throw new CacheNotFoundException(digest, digestUtil);
       }
       return out.toByteArray();
     }