cuspymd commented on a change in pull request #4128:
URL: https://github.com/apache/zeppelin/pull/4128#discussion_r644049588
##########
File path:
flink/flink-scala-parent/src/main/java/org/apache/zeppelin/flink/FlinkInterpreter.java
##########
@@ -25,45 +26,74 @@
import org.apache.zeppelin.interpreter.InterpreterContext;
import org.apache.zeppelin.interpreter.InterpreterException;
import org.apache.zeppelin.interpreter.InterpreterResult;
+import org.apache.zeppelin.interpreter.ZeppelinContext;
import org.apache.zeppelin.interpreter.thrift.InterpreterCompletion;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
+import java.net.URLClassLoader;
+import java.util.HashMap;
import java.util.List;
+import java.util.Map;
import java.util.Properties;
/**
- * Interpreter for flink scala. It delegates all the function to
FlinkScalaInterpreter.
+ * Interpreter for flink scala. It delegates all the function to
FlinkScalaInterpreter
+ * which is implemented by flink scala shell underneath.
*/
public class FlinkInterpreter extends Interpreter {
private static final Logger LOGGER =
LoggerFactory.getLogger(FlinkInterpreter.class);
+ private Map<String, String> innerInterpreterClassMap = new HashMap<>();
private FlinkScalaInterpreter innerIntp;
- private FlinkZeppelinContext z;
+ private ZeppelinContext z;
public FlinkInterpreter(Properties properties) {
super(properties);
+ innerInterpreterClassMap.put("2.11",
"org.apache.zeppelin.flink.FlinkScala211Interpreter");
+ innerInterpreterClassMap.put("2.12",
"org.apache.zeppelin.flink.FlinkScala212Interpreter");
}
- private void checkScalaVersion() throws InterpreterException {
+ private String extractScalaVersion() throws InterpreterException {
String scalaVersionString = scala.util.Properties.versionString();
LOGGER.info("Using Scala: " + scalaVersionString);
if (scalaVersionString.contains("version 2.11")) {
- return;
+ return "2.11";
+ } else if (scalaVersionString.contains("version 2.12")) {
+ return "2.12";
} else {
throw new InterpreterException("Unsupported scala version: " +
scalaVersionString +
- ", Only scala 2.11 is supported");
+ ", Only scala 2.11/2.12 is supported");
}
}
@Override
public void open() throws InterpreterException {
- checkScalaVersion();
-
- this.innerIntp = new FlinkScalaInterpreter(getProperties());
- this.innerIntp.open();
- this.z = this.innerIntp.getZeppelinContext();
+ try {
+ this.innerIntp = loadFlinkScalaInterpreter();
+ this.innerIntp.open();
+ this.z = this.innerIntp.getZeppelinContext();
+ } catch (Exception e) {
+ throw new InterpreterException("Fail to open FlinkInterpreter", e);
Review comment:
It seems be strange to run again `new InterpreterException()` when
`loadFlinkScalaInterpreter()` throws an exception of the type
`InterpreterException`.
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