1 files changed, 44 insertions, 0 deletions
diff --git a/hv-collector-core/src/main/kotlin/org/onap/dcae/collectors/veshv/impl/WireDecoder.kt b/hv-collector-core/src/main/kotlin/org/onap/dcae/collectors/veshv/impl/WireDecoder.kt
new file mode 100644
index 00000000..66ced2d7
--- /dev/null
+++ b/hv-collector-core/src/main/kotlin/org/onap/dcae/collectors/veshv/impl/WireDecoder.kt
@@ -0,0 +1,44 @@
+/*
+ * ============LICENSE_START=======================================================
+ * dcaegen2-collectors-veshv
+ * ================================================================================
+ * Copyright (C) 2018 NOKIA Intellectual Property. All rights reserved.
+ * ================================================================================
+ * Licensed 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.
+ * ============LICENSE_END=========================================================
+ */
+package org.onap.dcae.collectors.veshv.impl
+
+import io.netty.buffer.ByteBuf
+import org.onap.dcae.collectors.veshv.domain.WireFrame
+import org.onap.dcae.collectors.veshv.utils.logging.Logger
+
+/**
+ * @author Piotr Jaszczyk <piotr.jaszczyk@nokia.com>
+ * @since May 2018
+ */
+internal class WireDecoder {
+    fun decode(byteBuf: ByteBuf): ByteBuf? =
+            try {
+                WireFrame.decode(byteBuf)
+                        .takeIf { it.isValid() }
+                        .let { it?.payload }
+            } catch (ex: IndexOutOfBoundsException) {
+                logger.debug { "Wire protocol frame could not be decoded - input is too small" }
+                null
+            }
+
+    companion object {
+        private val logger = Logger(WireDecoder::class)
+    }
+}