[BUG]Fix the bug of port identification failure when connecting Oracle with...

[BUG]Fix the bug of port identification failure when connecting Oracle with Sid mode (JDBC: Oracle: thin: @ < host >: < port > / < Sid >) (#4320)

* [BUG]Fix the bug of port identification failure when connecting Oracle with Sid mode (JDBC: Oracle: thin: @ < host >: < port > / < Sid >)
Co-authored-by: 吴晟 Wu Sheng <wu.sheng@foxmail.com>

apm-sniffer/apm-sdk-plugin/jdbc-commons/src/main/java/org/apache/skywalking/apm/plugin/jdbc/connectionurl/parser/OracleURLParser.java

@@ -136,6 +136,22 @@ public class OracleURLParser extends AbstractURLParser {
 
     private String[] splitDatabaseAddress(String address) {
         String[] hostSegment = address.split(":");
-        return hostSegment;
+        if (hostSegment.length == 1 && super.fetchDatabaseNameFromURL().contains("/")) {
+            String[] portAndDatabaseName = super.fetchDatabaseNameFromURL().split("/");
+            return new String[]{hostSegment[0], portAndDatabaseName[0]};
+        } else {
+            return hostSegment;
+        }
+    }
+
+    @Override
+    protected String fetchDatabaseNameFromURL() {
+        String databaseName = super.fetchDatabaseNameFromURL();
+        if (databaseName.contains("/")) {
+            String[] portAndDatabaseName = databaseName.split("/");
+            return portAndDatabaseName[1];
+        } else {
+            return databaseName;
+        }
     }
 }

apm-sniffer/apm-sdk-plugin/jdbc-commons/src/test/java/org/apache/skywalking/apm/plugin/jdbc/connectionurl/parser/URLParserTest.java

@@ -82,6 +82,14 @@ public class URLParserTest {
         assertThat(connectionInfo.getDatabasePeer(), is("localhost:1522"));
     }
 
+    @Test
+    public void testParseOracleSID() {
+        ConnectionInfo connectionInfo = new URLParser().parser("jdbc:oracle:thin:@localhost:1522/orcl");
+        assertThat(connectionInfo.getDBType(), is("Oracle"));
+        assertThat(connectionInfo.getDatabaseName(), is("orcl"));
+        assertThat(connectionInfo.getDatabasePeer(), is("localhost:1522"));
+    }
+
     @Test
     public void testParseOracleServiceName() {
         ConnectionInfo connectionInfo = new URLParser().parser("jdbc:oracle:thin:@//localhost:1521/orcl");