Deserialization validation

disk-buffering/src/main/java/io/opentelemetry/contrib/disk/buffering/internal/exporter/FromDiskExporterImpl.java

@@ -5,8 +5,10 @@
 
 package io.opentelemetry.contrib.disk.buffering.internal.exporter;
 
+import io.opentelemetry.contrib.disk.buffering.internal.serialization.deserializers.DeserializationException;
 import io.opentelemetry.contrib.disk.buffering.internal.serialization.deserializers.SignalDeserializer;
 import io.opentelemetry.contrib.disk.buffering.internal.storage.Storage;
+import io.opentelemetry.contrib.disk.buffering.internal.storage.files.reader.ProcessResult;
 import io.opentelemetry.contrib.disk.buffering.internal.storage.responses.ReadableResult;
 import io.opentelemetry.contrib.disk.buffering.internal.utils.DebugLogger;
 import io.opentelemetry.sdk.common.CompletableResultCode;
@@ -64,11 +66,15 @@ public boolean exportStoredBatch(long timeout, TimeUnit unit) throws IOException
                       + " "
                       + deserializer.signalType()
                       + " bytes from storage.");
-              List<EXPORT_DATA> telemetry = deserializer.deserialize(bytes);
-              logger.log(
-                  "Now exporting batch of " + telemetry.size() + " " + deserializer.signalType());
-              CompletableResultCode join = exportFunction.apply(telemetry).join(timeout, unit);
-              return join.isSuccess();
+              try {
+                List<EXPORT_DATA> telemetry = deserializer.deserialize(bytes);
+                logger.log(
+                    "Now exporting batch of " + telemetry.size() + " " + deserializer.signalType());
+                CompletableResultCode join = exportFunction.apply(telemetry).join(timeout, unit);
+                return join.isSuccess() ? ProcessResult.SUCCEEDED : ProcessResult.TRY_LATER;
+              } catch (DeserializationException e) {
+                return ProcessResult.CONTENT_INVALID;
+              }
             });
     return result == ReadableResult.SUCCEEDED;
   }

disk-buffering/src/main/java/io/opentelemetry/contrib/disk/buffering/internal/serialization/deserializers/DeserializationException.java

@@ -0,0 +1,15 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.contrib.disk.buffering.internal.serialization.deserializers;
+
+import java.io.IOException;
+
+@SuppressWarnings("serial")
+public class DeserializationException extends IOException {
+  public DeserializationException(Throwable cause) {
+    super(cause);
+  }
+}

disk-buffering/src/main/java/io/opentelemetry/contrib/disk/buffering/internal/serialization/deserializers/LogRecordDataDeserializer.java

@@ -22,11 +22,11 @@ static LogRecordDataDeserializer getInstance() {
   }
 
   @Override
-  public List<LogRecordData> deserialize(byte[] source) {
+  public List<LogRecordData> deserialize(byte[] source) throws DeserializationException {
     try {
       return ProtoLogsDataMapper.getInstance().fromProto(LogsData.ADAPTER.decode(source));
     } catch (IOException e) {
-      throw new IllegalArgumentException(e);
+      throw new DeserializationException(e);
     }
   }
 

disk-buffering/src/main/java/io/opentelemetry/contrib/disk/buffering/internal/serialization/deserializers/MetricDataDeserializer.java

@@ -22,11 +22,11 @@ static MetricDataDeserializer getInstance() {
   }
 
   @Override
-  public List<MetricData> deserialize(byte[] source) {
+  public List<MetricData> deserialize(byte[] source) throws DeserializationException {
     try {
       return ProtoMetricsDataMapper.getInstance().fromProto(MetricsData.ADAPTER.decode(source));
     } catch (IOException e) {
-      throw new IllegalArgumentException(e);
+      throw new DeserializationException(e);
     }
   }
 

disk-buffering/src/main/java/io/opentelemetry/contrib/disk/buffering/internal/serialization/deserializers/SignalDeserializer.java

@@ -25,7 +25,7 @@ static SignalDeserializer<LogRecordData> ofLogs() {
   }
 
   /** Deserializes the given byte array into a list of telemetry items. */
-  List<SDK_ITEM> deserialize(byte[] source);
+  List<SDK_ITEM> deserialize(byte[] source) throws DeserializationException;
 
   /** Returns the name of the stored type of signal -- one of "metrics", "spans", or "logs". */
   default String signalType() {

disk-buffering/src/main/java/io/opentelemetry/contrib/disk/buffering/internal/serialization/deserializers/SpanDataDeserializer.java

@@ -22,11 +22,11 @@ static SpanDataDeserializer getInstance() {
   }
 
   @Override
-  public List<SpanData> deserialize(byte[] source) {
+  public List<SpanData> deserialize(byte[] source) throws DeserializationException {
     try {
       return ProtoSpansDataMapper.getInstance().fromProto(TracesData.ADAPTER.decode(source));
     } catch (IOException e) {
-      throw new IllegalArgumentException(e);
+      throw new DeserializationException(e);
     }
   }
 

disk-buffering/src/main/java/io/opentelemetry/contrib/disk/buffering/internal/storage/Storage.java

@@ -10,6 +10,7 @@
 import io.opentelemetry.contrib.disk.buffering.internal.exporter.FromDiskExporterImpl;
 import io.opentelemetry.contrib.disk.buffering.internal.storage.files.ReadableFile;
 import io.opentelemetry.contrib.disk.buffering.internal.storage.files.WritableFile;
+import io.opentelemetry.contrib.disk.buffering.internal.storage.files.reader.ProcessResult;
 import io.opentelemetry.contrib.disk.buffering.internal.storage.responses.ReadableResult;
 import io.opentelemetry.contrib.disk.buffering.internal.storage.responses.WritableResult;
 import io.opentelemetry.contrib.disk.buffering.internal.utils.DebugLogger;
@@ -77,12 +78,13 @@ private boolean write(byte[] item, int attemptNumber) throws IOException {
    * @param processing Is passed over to {@link ReadableFile#readAndProcess(Function)}.
    * @throws IOException If an unexpected error happens.
    */
-  public ReadableResult readAndProcess(Function<byte[], Boolean> processing) throws IOException {
+  public ReadableResult readAndProcess(Function<byte[], ProcessResult> processing)
+      throws IOException {
     return readAndProcess(processing, 1);
   }
 
-  private ReadableResult readAndProcess(Function<byte[], Boolean> processing, int attemptNumber)
-      throws IOException {
+  private ReadableResult readAndProcess(
+      Function<byte[], ProcessResult> processing, int attemptNumber) throws IOException {
     if (isClosed.get()) {
       logger.log("Refusing to read from storage after being closed.");
       return ReadableResult.FAILED;
@@ -103,7 +105,7 @@ private ReadableResult readAndProcess(Function<byte[], Boolean> processing, int
     ReadableResult result = readableFile.readAndProcess(processing);
     switch (result) {
       case SUCCEEDED:
-      case PROCESSING_FAILED:
+      case TRY_LATER:
         return result;
       default:
         // Retry with new file

disk-buffering/src/main/java/io/opentelemetry/contrib/disk/buffering/internal/storage/files/ReadableFile.java

@@ -9,6 +9,7 @@
 
 import io.opentelemetry.contrib.disk.buffering.StorageConfiguration;
 import io.opentelemetry.contrib.disk.buffering.internal.storage.files.reader.DelimitedProtoStreamReader;
+import io.opentelemetry.contrib.disk.buffering.internal.storage.files.reader.ProcessResult;
 import io.opentelemetry.contrib.disk.buffering.internal.storage.files.reader.ReadResult;
 import io.opentelemetry.contrib.disk.buffering.internal.storage.files.reader.StreamReader;
 import io.opentelemetry.contrib.disk.buffering.internal.storage.files.utils.FileTransferUtil;
@@ -83,7 +84,7 @@ public ReadableFile(
    *     If the processing function returns TRUE, then the provided line will be deleted from the
    *     source file. If the function returns FALSE, no changes will be applied to the source file.
    */
-  public synchronized ReadableResult readAndProcess(Function<byte[], Boolean> processing)
+  public synchronized ReadableResult readAndProcess(Function<byte[], ProcessResult> processing)
       throws IOException {
     if (isClosed.get()) {
       return ReadableResult.FAILED;
@@ -97,20 +98,25 @@ public synchronized ReadableResult readAndProcess(Function<byte[], Boolean> proc
       cleanUp();
       return ReadableResult.FAILED;
     }
-    if (processing.apply(read.content)) {
-      unconsumedResult = null;
-      readBytes += read.totalReadLength;
-      int amountOfBytesToTransfer = originalFileSize - readBytes;
-      if (amountOfBytesToTransfer > 0) {
-        fileTransferUtil.transferBytes(readBytes, amountOfBytesToTransfer);
-      } else {
+    switch (processing.apply(read.content)) {
+      case SUCCEEDED:
+        unconsumedResult = null;
+        readBytes += read.totalReadLength;
+        int amountOfBytesToTransfer = originalFileSize - readBytes;
+        if (amountOfBytesToTransfer > 0) {
+          fileTransferUtil.transferBytes(readBytes, amountOfBytesToTransfer);
+        } else {
+          cleanUp();
+        }
+        return ReadableResult.SUCCEEDED;
+      case TRY_LATER:
+        unconsumedResult = read;
+        return ReadableResult.TRY_LATER;
+      case CONTENT_INVALID:
         cleanUp();
-      }
-      return ReadableResult.SUCCEEDED;
-    } else {
-      unconsumedResult = read;
-      return ReadableResult.PROCESSING_FAILED;
+        return ReadableResult.FAILED;
     }
+    return ReadableResult.FAILED;
   }
 
   @Nullable

disk-buffering/src/main/java/io/opentelemetry/contrib/disk/buffering/internal/storage/files/reader/ProcessResult.java

@@ -0,0 +1,13 @@
+/*
+ * Copyright The OpenTelemetry Authors
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+package io.opentelemetry.contrib.disk.buffering.internal.storage.files.reader;
+
+/** Result of processing the contents of a file. */
+public enum ProcessResult {
+  SUCCEEDED,
+  TRY_LATER,
+  CONTENT_INVALID
+}

disk-buffering/src/main/java/io/opentelemetry/contrib/disk/buffering/internal/storage/responses/ReadableResult.java

@@ -8,5 +8,5 @@
 public enum ReadableResult {
   SUCCEEDED,
   FAILED,
-  PROCESSING_FAILED
+  TRY_LATER
 }

disk-buffering/src/test/java/io/opentelemetry/contrib/disk/buffering/FromDiskExporterImplTest.java

@@ -14,6 +14,7 @@
 import static org.mockito.Mockito.when;
 
 import io.opentelemetry.contrib.disk.buffering.internal.exporter.FromDiskExporterImpl;
+import io.opentelemetry.contrib.disk.buffering.internal.serialization.deserializers.DeserializationException;
 import io.opentelemetry.contrib.disk.buffering.internal.serialization.deserializers.SignalDeserializer;
 import io.opentelemetry.contrib.disk.buffering.internal.storage.TestData;
 import io.opentelemetry.sdk.common.Clock;
@@ -88,12 +89,23 @@ void verifyStorageFolderIsCreated() {
     assertThat(new File(rootDir, STORAGE_FOLDER_NAME).exists()).isTrue();
   }
 
+  @Test
+  void whenDeserializationFails_returnFalse() throws IOException {
+    when(deserializer.deserialize(any()))
+        .thenAnswer(
+            invocation -> {
+              throw new DeserializationException(new IOException("Some exception"));
+            });
+
+    assertThat(exporter.exportStoredBatch(1, TimeUnit.SECONDS)).isFalse();
+  }
+
   private void createDummyFile() throws IOException {
     File file = new File(rootDir, STORAGE_FOLDER_NAME + "/" + 1000L);
     Files.write(file.toPath(), singletonList("First line"));
   }
 
-  private void setUpSerializer() {
+  private void setUpSerializer() throws DeserializationException {
     deserializer = mock();
     when(deserializer.deserialize(any())).thenReturn(deserializedData);
   }

disk-buffering/src/test/java/io/opentelemetry/contrib/disk/buffering/internal/storage/StorageTest.java

@@ -5,7 +5,7 @@
 
 package io.opentelemetry.contrib.disk.buffering.internal.storage;
 
-import static io.opentelemetry.contrib.disk.buffering.internal.storage.responses.ReadableResult.PROCESSING_FAILED;
+import static io.opentelemetry.contrib.disk.buffering.internal.storage.responses.ReadableResult.TRY_LATER;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.mockito.ArgumentMatchers.any;
@@ -17,6 +17,7 @@
 
 import io.opentelemetry.contrib.disk.buffering.internal.storage.files.ReadableFile;
 import io.opentelemetry.contrib.disk.buffering.internal.storage.files.WritableFile;
+import io.opentelemetry.contrib.disk.buffering.internal.storage.files.reader.ProcessResult;
 import io.opentelemetry.contrib.disk.buffering.internal.storage.responses.ReadableResult;
 import io.opentelemetry.contrib.disk.buffering.internal.storage.responses.WritableResult;
 import java.io.IOException;
@@ -28,7 +29,7 @@
 class StorageTest {
   private FolderManager folderManager;
   private Storage storage;
-  private Function<byte[], Boolean> processing;
+  private Function<byte[], ProcessResult> processing;
   private ReadableFile readableFile;
   private WritableFile writableFile;
 
@@ -52,11 +53,11 @@ void whenReadingAndProcessingSuccessfully_returnSuccess() throws IOException {
   }
 
   @Test
-  void whenReadableFileProcessingFails_returnFailed() throws IOException {
+  void whenReadableFileProcessingFails_returnTryLater() throws IOException {
     when(folderManager.getReadableFile()).thenReturn(readableFile);
-    when(readableFile.readAndProcess(processing)).thenReturn(PROCESSING_FAILED);
+    when(readableFile.readAndProcess(processing)).thenReturn(TRY_LATER);
 
-    assertEquals(PROCESSING_FAILED, storage.readAndProcess(processing));
+    assertEquals(TRY_LATER, storage.readAndProcess(processing));
 
     verify(readableFile).readAndProcess(processing);
   }