added PlatformTxnRecord

Signed-off-by: abhishek-hedera <[email protected]>

hedera-node/src/main/java/com/hedera/services/ServicesState.java

@@ -55,7 +55,6 @@
 import com.swirlds.common.merkle.MerkleNode;
 import com.swirlds.common.merkle.utility.AbstractNaryMerkleInternal;
 import com.swirlds.fcmap.FCMap;
-import com.typesafe.config.ConfigException;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 

hedera-node/src/main/java/com/hedera/services/legacy/services/state/AwareProcessLogic.java

@@ -20,7 +20,6 @@
  * ‍
  */
 
-import com.google.protobuf.InvalidProtocolBufferException;
 import com.hedera.services.context.ServicesContext;
 import com.hedera.services.legacy.crypto.SignatureStatus;
 import com.hedera.services.sigs.sourcing.ScopedSigBytesProvider;

hedera-node/src/main/java/com/hedera/services/utils/PlatformTxnRecord.java

@@ -0,0 +1,58 @@
+package com.hedera.services.utils;
+
+/*-
+ * ‌
+ * Hedera Services Node
+ * ​
+ * Copyright (C) 2018 - 2021 Hedera Hashgraph, LLC
+ * ​
+ * 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.
+ * ‍
+ */
+
+import com.google.common.cache.Cache;
+import com.google.common.cache.CacheBuilder;
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.swirlds.common.Transaction;
+
+import java.util.concurrent.TimeUnit;
+
+public class PlatformTxnRecord {
+
+    private Cache<Transaction, PlatformTxnAccessor> cache;
+    private long timeToExpire;
+
+    public PlatformTxnRecord(long timeToExpire) {
+        this.timeToExpire = timeToExpire;
+        cache = CacheBuilder.newBuilder()
+                .expireAfterWrite(timeToExpire, TimeUnit.SECONDS)
+                .build();
+    }
+
+    public PlatformTxnAccessor getPlatformTxnAccessor(Transaction platformTxn){
+        if(platformTxn == null)
+            return null;
+
+        return cache.getIfPresent(platformTxn);
+
+    }
+
+    public void addTransaction(Transaction transaction) throws InvalidProtocolBufferException {
+        PlatformTxnAccessor accessor = new PlatformTxnAccessor(transaction);
+        cache.put(transaction, accessor);
+    }
+
+    public long getTimeToExpire() {
+        return timeToExpire;
+    }
+}

hedera-node/src/test/java/com/hedera/services/utils/PlatformTxnRecordTest.java

@@ -0,0 +1,102 @@
+package com.hedera.services.utils;
+
+/*-
+ * ‌
+ * Hedera Services Node
+ * ​
+ * Copyright (C) 2018 - 2021 Hedera Hashgraph, LLC
+ * ​
+ * 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.
+ * ‍
+ */
+
+
+import com.google.protobuf.InvalidProtocolBufferException;
+import com.swirlds.common.Transaction;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import static com.hedera.services.utils.SleepingPause.SLEEPING_PAUSE;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.mockito.BDDMockito.given;
+import static org.mockito.BDDMockito.mock;
+
+public class PlatformTxnRecordTest {
+    private Transaction platformTxn;
+    private PlatformTxnRecord subject;
+
+    @BeforeEach
+    private void setup(){
+        platformTxn = mock(Transaction.class);
+        given(platformTxn.getContents()).willReturn(
+                com.hederahashgraph.api.proto.java.Transaction.getDefaultInstance().toByteArray());
+
+        subject = new PlatformTxnRecord(1L);
+    }
+
+    @Test
+    public void getPlatformTxnAccessorWillReturnNullWhenEmptyTransaction() {
+        // when
+        assertNull(subject.getPlatformTxnAccessor(null));
+    }
+
+    @Test
+    void getPlatformTxnAccessorWillReturnNullWhenTransactionsAreDifferent() throws InvalidProtocolBufferException{
+        // setup
+        Transaction transactionA = new Transaction("abc".getBytes());
+
+        // when
+        subject.addTransaction(platformTxn);
+
+        // then
+        assertNull(subject.getPlatformTxnAccessor(transactionA));
+    }
+
+    @Test
+    void addTransactionWillThrowExceptionOnInvalidTxn() {
+        // setup
+        Transaction transactionA = new Transaction("abc".getBytes());
+
+        // when
+        assertThrows(InvalidProtocolBufferException.class, () -> subject.addTransaction(transactionA));
+    }
+
+    @Test
+    void getPlatformTxnAccessorReturnsSameTransaction() throws InvalidProtocolBufferException{
+        // when
+        subject.addTransaction(platformTxn);
+
+        //then
+        assertEquals(platformTxn, subject.getPlatformTxnAccessor(platformTxn).getPlatformTxn());
+    }
+
+    @Test
+    void defaultTimeToExpireIsSame(){
+        // when
+        assertEquals(1, subject.getTimeToExpire());
+    }
+
+    @Test
+    void getPlatformTxnAccessorWillReturnNullAfterExpiry() throws InvalidProtocolBufferException {
+        // when
+        subject.addTransaction(platformTxn);
+
+        // then
+        SLEEPING_PAUSE.forMs(50L);
+        assertEquals(platformTxn, subject.getPlatformTxnAccessor(platformTxn).getPlatformTxn());
+        SLEEPING_PAUSE.forMs(1000L);
+        assertNull(subject.getPlatformTxnAccessor(platformTxn));
+    }
+}