added diagnostics flag

removed duplicate main instances
moved logic from main to DumperMetadata.class
DumperMetadata.run functions overridden
Deprecated upper mentioned run functions of DumperMetadata.class

Author: kaxuna

dumper/app/src/main/java/com/google/edwmigration/dumper/application/dumper/ConnectorArguments.java

@@ -82,6 +82,7 @@ public class ConnectorArguments extends DefaultArguments {
           + "\n";
 
   public static final String OPT_CONNECTOR = "connector";
+  public static final String OPT_DIAGNOSTICS = "diagnostics";
   public static final String OPT_DRIVER = "driver";
   public static final String OPT_CLASS = "jdbcDriverClass";
   public static final String OPT_URI = "url";
@@ -471,6 +472,13 @@ public class ConnectorArguments extends DefaultArguments {
           .ofType(Integer.class)
           .defaultsTo(OPT_THREAD_POOL_SIZE_DEFAULT);
 
+  private final OptionSpec<Boolean> optionDiagnostics =
+      parser
+          .accepts(OPT_DIAGNOSTICS, "Allows dumper diagnostics to be turned on/off")
+          .withOptionalArg()
+          .ofType(Boolean.class)
+          .defaultsTo(true);
+
   public final OptionSpec<String> optionHadoopHdfsSiteXml =
       parser
           .accepts(
@@ -1048,6 +1056,10 @@ public List<String> getQueryLogAlternates() {
     return getOptions().valuesOf(optionQueryLogAlternates);
   }
 
+  public boolean isDiagnosticsOn() {
+    return getOptions().valueOf(optionDiagnostics);
+  }
+
   public boolean isTestFlag(char c) {
     String flags = getOptions().valueOf(optionFlags);
     if (flags == null) {
@@ -1214,7 +1226,8 @@ public String toString() {
             .add(OPT_QUERY_LOG_START, getQueryLogStart())
             .add(OPT_QUERY_LOG_END, getQueryLogEnd())
             .add(OPT_QUERY_LOG_ALTERNATES, getQueryLogAlternates())
-            .add(OPT_ASSESSMENT, isAssessment());
+            .add(OPT_ASSESSMENT, isAssessment())
+            .add(OPT_DIAGNOSTICS, isDiagnosticsOn());
     getConnectorProperties().getDefinitionMap().forEach(toStringHelper::add);
     return toStringHelper.toString();
   }

dumper/app/src/main/java/com/google/edwmigration/dumper/application/dumper/Main.java

@@ -21,25 +21,13 @@
 import com.google.common.base.Throwables;
 import com.google.common.collect.ImmutableList;
 import java.util.Objects;
-import javax.annotation.Nonnull;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /** @author miguel */
 public class Main {
 
   private static final Logger logger = LoggerFactory.getLogger(Main.class);
-  private static final TelemetryProcessor telemetryProcessor = new TelemetryProcessor();
-
-  private final MetadataDumper metadataDumper;
-
-  public Main(MetadataDumper metadataDumper) {
-    this.metadataDumper = metadataDumper;
-  }
-
-  public boolean run(@Nonnull String... args) throws Exception {
-    return metadataDumper.run(args);
-  }
 
   private static void printErrorMessages(Throwable e) {
     new SummaryPrinter()
@@ -64,14 +52,14 @@ private static void printErrorMessages(Throwable e) {
   public static void main(String... args) throws Exception {
     try {
       StartUpMetaInfoProcessor.printMetaInfo();
-      telemetryProcessor.setDumperMetadata(StartUpMetaInfoProcessor.getDumperMetadata());
-
-      Main main = new Main(new MetadataDumper(telemetryProcessor));
 
       if (args.length == 0) {
         args = new String[] {"--help"};
       }
-      if (!main.run(args)) {
+
+      MetadataDumper metadataDumper = new MetadataDumper(args);
+
+      if (!metadataDumper.run()) {
         System.exit(1);
       }
     } catch (MetadataDumperUsageException e) {

dumper/app/src/main/java/com/google/edwmigration/dumper/application/dumper/MetadataDumper.java

@@ -61,14 +61,128 @@ public class MetadataDumper {
   private static final Pattern GCS_PATH_PATTERN =
       Pattern.compile("gs://(?<bucket>[^/]+)/(?<path>.*)");
 
-  private final TelemetryProcessor telemetryProcessor;
+  private TelemetryProcessor telemetryProcessor;
+  private ConnectorArguments connectorArguments;
 
-  public MetadataDumper(TelemetryProcessor telemetryProcessor) {
-    this.telemetryProcessor = telemetryProcessor;
+  public MetadataDumper() {}
+
+  public MetadataDumper(String... args) throws Exception {
+    this.connectorArguments = new ConnectorArguments(JsonResponseFile.addResponseFiles(args));
+    telemetryProcessor = new TelemetryProcessor(connectorArguments.isDiagnosticsOn());
+    if (connectorArguments.saveResponseFile()) {
+      JsonResponseFile.save(connectorArguments);
+    }
+  }
+
+  public boolean run() throws Exception {
+    String connectorName = connectorArguments.getConnectorName();
+
+    Connector connector = ConnectorRepository.getInstance().getByName(connectorName);
+    if (connector == null) {
+      logger.error(
+          "Target connector '{}' not supported; available are {}.",
+          connectorName,
+          ConnectorRepository.getInstance().getAllNames());
+      return false;
+    }
+    connector.validate(connectorArguments);
+    return run(connector);
+  }
+
+  protected boolean run(@Nonnull Connector connector) throws Exception {
+    List<Task<?>> tasks = new ArrayList<>();
+    tasks.add(new VersionTask());
+    tasks.add(new ArgumentsTask(connectorArguments));
+    {
+      File sqlScript = connectorArguments.getSqlScript();
+      if (sqlScript != null) {
+        tasks.add(new JdbcRunSQLScript(sqlScript));
+      }
+    }
+    connector.addTasksTo(tasks, connectorArguments);
+
+    // The default output file is based on the connector.
+    // We had a customer request to base it on the database, but that isn't well-defined,
+    // as there may be 0 or N databases in a single file.
+    String outputFileLocation = getOutputFileLocation(connector, connectorArguments);
+
+    if (connectorArguments.isDryRun()) {
+      String title = "Dry run: Printing task list for " + connector.getName();
+      System.out.println(title);
+      System.out.println(repeat('=', title.length()));
+      System.out.println("Writing to " + outputFileLocation);
+      for (Task<?> task : tasks) {
+        print(task, 1);
+      }
+      return true;
+    } else {
+      Stopwatch stopwatch = Stopwatch.createStarted();
+      long outputFileLength = 0;
+      TaskSetState.Impl state = new TaskSetState.Impl();
+
+      logger.info("Using connector: [{}]", connector);
+      SummaryPrinter summaryPrinter = new SummaryPrinter();
+      boolean requiredTaskSucceeded = false;
+
+      try (Closer closer = Closer.create()) {
+        Path outputPath = prepareOutputPath(outputFileLocation, closer, connectorArguments);
+
+        URI outputUri = URI.create("jar:" + outputPath.toUri());
+
+        Map<String, Object> fileSystemProperties =
+            ImmutableMap.<String, Object>builder()
+                .put("create", "true")
+                .put("useTempFile", Boolean.TRUE)
+                .build();
+        FileSystem fileSystem =
+            closer.register(FileSystems.newFileSystem(outputUri, fileSystemProperties));
+        OutputHandleFactory sinkFactory =
+            new FileSystemOutputHandleFactory(fileSystem, "/"); // It's required to be "/"
+        logger.debug("Target filesystem is [{}]", sinkFactory);
+
+        Handle handle = closer.register(connector.open(connectorArguments));
+
+        new TasksRunner(
+                sinkFactory,
+                handle,
+                connectorArguments.getThreadPoolSize(),
+                state,
+                tasks,
+                connectorArguments)
+            .run();
+
+        requiredTaskSucceeded = checkRequiredTaskSuccess(summaryPrinter, state, outputFileLocation);
+
+        telemetryProcessor.addDumperRunMetricsToPayload(
+            connectorArguments, state, stopwatch, requiredTaskSucceeded);
+        telemetryProcessor.processTelemetry(fileSystem);
+      } finally {
+        // We must do this in finally after the ZipFileSystem has been closed.
+        File outputFile = new File(outputFileLocation);
+        if (outputFile.isFile()) {
+          outputFileLength = outputFile.length();
+        }
+
+        printTaskResults(summaryPrinter, state);
+        logFinalSummary(
+            summaryPrinter,
+            state,
+            outputFileLength,
+            stopwatch,
+            outputFileLocation,
+            requiredTaskSucceeded);
+      }
+
+      return requiredTaskSucceeded;
+    }
   }
 
+  /** @deprecated Use {@link #run()} instead. Should be deleted after refactoring the tests */
+  @Deprecated
   public boolean run(String... args) throws Exception {
     ConnectorArguments arguments = new ConnectorArguments(JsonResponseFile.addResponseFiles(args));
+    telemetryProcessor = new TelemetryProcessor(arguments.isDiagnosticsOn());
+
     try {
       return run(arguments);
     } finally {
@@ -78,6 +192,8 @@ public boolean run(String... args) throws Exception {
     }
   }
 
+  /** @deprecated Use {@link #run()} instead. Should be deleted after refactoring the tests */
+  @Deprecated
   public boolean run(@Nonnull ConnectorArguments arguments) throws Exception {
     String connectorName = arguments.getConnectorName();
     if (connectorName == null) {
@@ -132,6 +248,8 @@ private Path prepareOutputPath(
     }
   }
 
+  /** @deprecated Use {@link #run()} instead. Should be deleted after refactoring the tests */
+  @Deprecated
   protected boolean run(@Nonnull Connector connector, @Nonnull ConnectorArguments arguments)
       throws Exception {
     List<Task<?>> tasks = new ArrayList<>();

dumper/app/src/main/java/com/google/edwmigration/dumper/application/dumper/TelemetryProcessor.java

@@ -32,13 +32,13 @@ public class TelemetryProcessor {
   private static final Logger logger = LoggerFactory.getLogger(TelemetryProcessor.class);
 
   private final ClientTelemetry clientTelemetry;
+  private final boolean shouldWrite;
 
-  public TelemetryProcessor() {
+  public TelemetryProcessor(boolean shouldWrite) {
     clientTelemetry = new ClientTelemetry();
-  }
+    clientTelemetry.setDumperMetadata(StartUpMetaInfoProcessor.getDumperMetadata());
 
-  public void setDumperMetadata(DumperMetadata dumperMetadata) {
-    clientTelemetry.setDumperMetadata(dumperMetadata);
+    this.shouldWrite = shouldWrite;
   }
 
   /**
@@ -47,6 +47,9 @@ public void setDumperMetadata(DumperMetadata dumperMetadata) {
    */
   public void addDumperRunMetricsToPayload(
       ConnectorArguments arguments, TaskSetState state, Stopwatch stopwatch, boolean success) {
+    if (!shouldWrite) {
+      return;
+    }
     try {
       clientTelemetry.setEventType(EventType.DUMPER_RUN_METRICS);
 
@@ -89,6 +92,9 @@ public void addDumperRunMetricsToPayload(
   }
 
   public void processTelemetry(FileSystem fileSystem) {
+    if (!shouldWrite) {
+      return;
+    }
     try {
       TelemetryWriter.write(fileSystem, clientTelemetry);
     } catch (Exception e) {

dumper/app/src/main/java/com/google/edwmigration/dumper/application/dumper/clouddumper/Main.java

@@ -21,7 +21,6 @@
 import com.google.cloud.kms.v1.KeyManagementServiceClient;
 import com.google.edwmigration.dumper.application.dumper.MetadataDumper;
 import com.google.edwmigration.dumper.application.dumper.MetadataDumperUsageException;
-import com.google.edwmigration.dumper.application.dumper.TelemetryProcessor;
 import com.google.gson.Gson;
 import com.google.protobuf.ByteString;
 import java.io.IOException;
@@ -100,7 +99,7 @@ public static void main(String... args) throws Exception {
                     /* maxRetries= */ 3, /* defaultRetryInterval= */ TimeValue.ofSeconds(1L)))
             .build()) {
       new Main(
-              () -> new MetadataDumper(new TelemetryProcessor()),
+              () -> new MetadataDumper(),
               new HttpClientMetadataRetriever(httpClient),
               DriverRetriever.create(httpClient, Files.createTempDirectory("clouddumper")))
           .run();

dumper/app/src/test/java/com/google/edwmigration/dumper/application/dumper/MetadataDumperTest.java

@@ -52,7 +52,7 @@ private enum TopLevelTestFile {
     }
   }
 
-  private Main dumper = new Main(new MetadataDumper(new TelemetryProcessor()));
+  private final MetadataDumper dumper = new MetadataDumper();
   private final Connector connector = new TestConnector();
 
   @Before

dumper/app/src/test/java/com/google/edwmigration/dumper/application/dumper/connector/AbstractConnectorExecutionTest.java

@@ -21,9 +21,7 @@
 import com.google.common.base.MoreObjects;
 import com.google.common.base.Predicates;
 import com.google.common.io.ByteSource;
-import com.google.edwmigration.dumper.application.dumper.Main;
 import com.google.edwmigration.dumper.application.dumper.MetadataDumper;
-import com.google.edwmigration.dumper.application.dumper.TelemetryProcessor;
 import com.google.edwmigration.dumper.application.dumper.task.AbstractTask;
 import com.google.edwmigration.dumper.common.io.ZipArchiveEntryByteSource;
 import com.google.edwmigration.dumper.plugin.lib.dumper.spi.CoreMetadataDumpFormat;
@@ -115,8 +113,7 @@ protected static List<String> findJdbcDrivers(@Nonnull String baseName) throws I
   }
 
   public void runDumper(@Nonnull String... args) throws Exception {
-    Main dumper = new Main(new MetadataDumper(new TelemetryProcessor()));
-    dumper.run(args);
+    new MetadataDumper().run(args);
   }
 
   protected static class ZipEntryValidator<E extends Enum<E>> {

dumper/app/src/test/java/com/google/edwmigration/dumper/application/dumper/connector/teradata/TeradataMetadataConnectorTest.java

@@ -39,7 +39,6 @@
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
 import javax.sql.DataSource;
-import org.apache.commons.lang3.ArrayUtils;
 import org.junit.Assume;
 import org.junit.Test;
 import org.junit.runner.RunWith;
@@ -272,15 +271,14 @@ public Void doInConnection(Connection connection)
             // "--database", "db_0"
             );
 
-    MetadataDumper dumper = new MetadataDumper(new TelemetryProcessor());
-
-    dumper.run(new ConnectorArguments(args.toArray(ArrayUtils.EMPTY_STRING_ARRAY)));
+    MetadataDumper dumper = new MetadataDumper(new String[] {});
+    dumper.run();
 
     CONTINUE:
     {
       // Prove that --continue is doing its thing.
       Stopwatch stopwatch = Stopwatch.createStarted();
-      dumper.run(new ConnectorArguments(args.toArray(ArrayUtils.EMPTY_STRING_ARRAY)));
+      dumper.run();
       assertTrue(
           "Second run of dumper was too slow.",
           stopwatch.elapsed(TimeUnit.SECONDS)