[WIP] NEW: DefaultDbMigration is configurable from properties

ebean-ddl-generator/src/main/java/io/ebeaninternal/dbmigration/DbMigrationPlugin.java

@@ -0,0 +1,56 @@
+package io.ebeaninternal.dbmigration;
+
+import java.io.IOException;
+
+import io.ebean.plugin.Plugin;
+import io.ebean.plugin.SpiServer;
+
+/**
+ * Plugin to generate db-migration scripts automatically.
+ * @author Roland Praml, FOCONIS AG
+  */
+public class DbMigrationPlugin implements Plugin {
+
+  private DefaultDbMigration dbMigration;
+
+  private static String lastMigration;
+  private static String lastInit;
+
+  @Override
+  public void configure(SpiServer server) {
+    dbMigration = new DefaultDbMigration();
+    dbMigration.setServer(server);
+  }
+
+  @Override
+  public void online(boolean online) {
+    try {
+      lastInit = null;
+      lastMigration = null;
+      if (dbMigration.generate) {
+        String tmp = lastMigration = dbMigration.generateMigration();
+        if (tmp == null) {
+          return;
+        }
+      }
+      if (dbMigration.generateInit) {
+        lastInit = dbMigration.generateInitMigration();
+      }
+    } catch (IOException e) {
+      throw new RuntimeException("Error while generating migration", e);
+    }
+  }
+
+  @Override
+  public void shutdown() {
+    dbMigration = null;
+  }
+
+  public static String getLastInit() {
+    return lastInit;
+  }
+
+  public static String getLastMigration() {
+    return lastMigration;
+  }
+}

ebean-ddl-generator/src/main/java/io/ebeaninternal/dbmigration/DefaultDbMigration.java

@@ -1,6 +1,7 @@
 package io.ebeaninternal.dbmigration;
 
 import io.avaje.applog.AppLog;
+import io.avaje.classpath.scanner.core.Location;
 import io.ebean.DB;
 import io.ebean.Database;
 import io.ebean.DatabaseBuilder;
@@ -10,6 +11,7 @@
 import io.ebean.config.dbplatform.DatabasePlatformProvider;
 import io.ebean.dbmigration.DbMigration;
 import io.ebean.util.IOUtils;
+import io.ebean.util.StringHelper;
 import io.ebeaninternal.api.DbOffline;
 import io.ebeaninternal.api.SpiEbeanServer;
 import io.ebeaninternal.dbmigration.ddlgeneration.DdlOptions;
@@ -24,10 +26,7 @@
 import java.io.File;
 import java.io.IOException;
 import java.io.Writer;
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Properties;
-import java.util.ServiceLoader;
+import java.util.*;
 
 import static io.ebeaninternal.api.PlatformMatch.matchPlatform;
 import static java.lang.System.Logger.Level.*;
@@ -59,8 +58,8 @@ public class DefaultDbMigration implements DbMigration {
   private static final String initialVersion = "1.0";
   private static final String GENERATED_COMMENT = "THIS IS A GENERATED FILE - DO NOT MODIFY";
 
-  private final List<DatabasePlatformProvider> platformProviders = new ArrayList<>();
-  protected final boolean online;
+  private List<DatabasePlatformProvider> platformProviders = new ArrayList<>();
+  protected boolean online;
   private boolean logToSystemOut = true;
   protected SpiEbeanServer server;
   protected String pathToResources = "src/main/resources";
@@ -75,8 +74,10 @@ public class DefaultDbMigration implements DbMigration {
   protected List<Pair> platforms = new ArrayList<>();
   protected DatabaseBuilder.Settings databaseBuilder;
   protected DbConstraintNaming constraintNaming;
+  @Deprecated
   protected Boolean strictMode;
-  protected Boolean includeGeneratedFileComment;
+  protected boolean includeGeneratedFileComment;
+  @Deprecated
   protected String header;
   protected String applyPrefix = "";
   protected String version;
@@ -86,6 +87,9 @@ public class DefaultDbMigration implements DbMigration {
   private int lockTimeoutSeconds;
   protected boolean includeBuiltInPartitioning = true;
   protected boolean includeIndex;
+  protected boolean generate = false;
+  protected boolean generateInit = false;
+  private boolean keepLastInit = true;
 
   /**
    * Create for offline migration generation.
@@ -122,12 +126,66 @@ public void setServerConfig(DatabaseBuilder builder) {
     if (constraintNaming == null) {
       this.constraintNaming = databaseBuilder.getConstraintNaming();
     }
+    if (databasePlatform == null) {
+      this.databasePlatform = databaseBuilder.getDatabasePlatform();
+    }
     Properties properties = config.getProperties();
     if (properties != null) {
-      PropertiesWrapper props = new PropertiesWrapper("ebean", config.getName(), properties, null);
+      PropertiesWrapper props = new PropertiesWrapper("ebean", config.getName(), properties, config.getClassLoadConfig());
       migrationPath = props.get("migration.migrationPath", migrationPath);
       migrationInitPath = props.get("migration.migrationInitPath", migrationInitPath);
       pathToResources = props.get("migration.pathToResources", pathToResources);
+      addForeignKeySkipCheck = props.getBoolean("migration.addForeignKeySkipCheck", addForeignKeySkipCheck);
+      applyPrefix = props.get("migration.applyPrefix", applyPrefix);
+      databasePlatform = props.createInstance(DatabasePlatform.class, "migration.databasePlatform", databasePlatform);
+      generatePendingDrop = props.get("migration.generatePendingDrop", generatePendingDrop);
+      includeBuiltInPartitioning = props.getBoolean("migration.includeBuiltInPartitioning", includeBuiltInPartitioning);
+      includeGeneratedFileComment = props.getBoolean("migration.includeGeneratedFileComment", includeGeneratedFileComment);
+      includeIndex = props.getBoolean("migration.includeIndex", includeIndex);
+      lockTimeoutSeconds = props.getInt("migration.lockTimeoutSeconds", lockTimeoutSeconds);
+      logToSystemOut = props.getBoolean("migration.logToSystemOut", logToSystemOut);
+      modelPath = props.get("migration.modelPath", modelPath);
+      modelSuffix = props.get("migration.modelSuffix", modelSuffix);
+      name = props.get("migration.name", name);
+      online = props.getBoolean("migration.online", online);
+      vanillaPlatform = props.getBoolean("migration.vanillaPlatform", vanillaPlatform);
+      version = props.get("migration.version", version);
+      generate = props.getBoolean("migration.generate", generate);
+      generateInit = props.getBoolean("migration.generateInit", generateInit);
+      // header & strictMode must be configured at DatabaseConfig level
+      parsePlatforms(props, config);
+    }
+  }
+
+  protected void parsePlatforms(PropertiesWrapper props, DatabaseBuilder.Settings config) {
+    String platforms = props.get("migration.platforms");
+    if (platforms == null || platforms.isEmpty()) {
+      return;
+    }
+    String[] tmp = StringHelper.splitNames(platforms);
+    for (String plat : tmp) {
+      DatabasePlatform dbPlatform;
+      String platformName = plat;
+      String platformPrefix = null;
+      int pos = plat.indexOf('=');
+      if (pos != -1) {
+        platformName = plat.substring(0, pos);
+        platformPrefix = plat.substring(pos + 1);
+      }
+
+      if (platformName.indexOf('.') == -1) {
+        // parse platform as enum value
+        Platform platform = Enum.valueOf(Platform.class, platformName.toUpperCase());
+        dbPlatform = platform(platform);
+      } else {
+        // parse platform as class
+        dbPlatform = (DatabasePlatform) config.getClassLoadConfig().newInstance(platformName);
+      }
+      if (platformPrefix == null) {
+        platformPrefix = dbPlatform.platform().name().toLowerCase();
+      }
+
+      addDatabasePlatform(dbPlatform, platformPrefix);
     }
   }
 
@@ -318,7 +376,18 @@ private String generateMigrationFor(boolean initMigration) throws IOException {
       }
 
       String pendingVersion = generatePendingDrop();
-      if (pendingVersion != null) {
+      if ("auto".equals(pendingVersion)) {
+        StringJoiner sj = new StringJoiner(",");
+        String diff = generateDiff(request);
+        if (diff != null) {
+          sj.add(diff);
+          request = createRequest(initMigration);
+        }
+        for (String pendingDrop : request.getPendingDrops()) {
+          sj.add(generatePendingDrop(request, pendingDrop));
+        }
+        return sj.length() == 0 ? null : sj.toString();
+      } else if (pendingVersion != null) {
         return generatePendingDrop(request, pendingVersion);
       } else {
         return generateDiff(request);
@@ -553,7 +622,7 @@ private String generateMigration(Request request, Migration dbMigration, String
       return null;
     } else {
       if (!platforms.isEmpty()) {
-        writeExtraPlatformDdl(fullVersion, request.currentModel, dbMigration, request.migrationDir);
+        writeExtraPlatformDdl(fullVersion, request.currentModel, dbMigration, request.migrationDir, request.initMigration && keepLastInit);
 
       } else if (databasePlatform != null) {
         // writer needs the current model to provide table/column details for
@@ -633,12 +702,17 @@ private String toUnderScore(String name) {
   /**
    * Write any extra platform ddl.
    */
-  private void writeExtraPlatformDdl(String fullVersion, CurrentModel currentModel, Migration dbMigration, File writePath) throws IOException {
+  private void writeExtraPlatformDdl(String fullVersion, CurrentModel currentModel, Migration dbMigration, File writePath, boolean clear) throws IOException {
     DdlOptions options = new DdlOptions(addForeignKeySkipCheck);
     for (Pair pair : platforms) {
       DdlWrite writer = new DdlWrite(new MConfiguration(), currentModel.read(), options);
       PlatformDdlWriter platformWriter = createDdlWriter(pair.platform);
       File subPath = platformWriter.subPath(writePath, pair.prefix);
+      if (clear) {
+        for (File existing : subPath.listFiles()) {
+          existing.delete();
+        }
+      }
       platformWriter.processMigration(dbMigration, writer, subPath, fullVersion);
     }
   }
@@ -656,7 +730,7 @@ private boolean writeMigrationXml(Migration dbMigration, File resourcePath, Stri
     if (file.exists()) {
       return false;
     }
-    String comment = Boolean.TRUE.equals(includeGeneratedFileComment) ? GENERATED_COMMENT : null;
+    String comment = includeGeneratedFileComment ? GENERATED_COMMENT : null;
     MigrationXmlWriter xmlWriter = new MigrationXmlWriter(comment);
     xmlWriter.write(dbMigration, file);
     return true;
@@ -674,11 +748,14 @@ private void setDefaults() {
       databasePlatform = server.databasePlatform();
     }
     if (databaseBuilder != null) {
+      // FIXME: StrictMode and header may be defined HERE and in DatabaseConfig.
+      //  We shoild change either DefaultDbMigration or databaseConfig, so that it is only
+      //  defined on one place
       if (strictMode != null) {
-        databaseBuilder.setDdlStrictMode(strictMode);
+        databaseBuilder.ddlStrictMode(strictMode);
       }
       if (header != null) {
-        databaseBuilder.setDdlHeader(header);
+        databaseBuilder.ddlHeader(header);
       }
     }
   }
@@ -748,15 +825,20 @@ public File migrationDirectory() {
    * Return the file path to write the xml and sql to.
    */
   File migrationDirectory(boolean initMigration) {
-    // path to src/main/resources in typical maven project
-    File resourceRootDir = new File(pathToResources);
-    if (!resourceRootDir.exists()) {
-      String msg = String.format("Error - path to resources %s does not exist. Absolute path is %s", pathToResources, resourceRootDir.getAbsolutePath());
-      throw new UnknownResourcePathException(msg);
-    }
-    String resourcePath = migrationPath(initMigration);
+    Location resourcePath = migrationPath(initMigration);
     // expect to be a path to something like - src/main/resources/dbmigration
-    File path = new File(resourceRootDir, resourcePath);
+    File path;
+    if (resourcePath.isClassPath()) {
+      // path to src/main/resources in typical maven project
+      File resourceRootDir = new File(pathToResources);
+      if (!resourceRootDir.exists()) {
+        String msg = String.format("Error - path to resources %s does not exist. Absolute path is %s", pathToResources, resourceRootDir.getAbsolutePath());
+        throw new UnknownResourcePathException(msg);
+      }
+      path = new File(resourceRootDir, resourcePath.path());
+    } else {
+      path = new File(resourcePath.path());
+    }
     if (!path.exists()) {
       if (!path.mkdirs()) {
         logInfo("Warning - Unable to ensure migration directory exists at %s", path.getAbsolutePath());
@@ -765,8 +847,9 @@ File migrationDirectory(boolean initMigration) {
     return path;
   }
 
-  private String migrationPath(boolean initMigration) {
-    return initMigration ? migrationInitPath : migrationPath;
+  private Location migrationPath(boolean initMigration) {
+    // remove classpath: or filesystem: prefix
+    return new Location(initMigration ? migrationInitPath : migrationPath);
   }
 
   /**

ebean-ddl-generator/src/main/java/module-info.java

@@ -1,5 +1,6 @@
 module io.ebean.ddl.generator {
 
+  uses io.ebean.plugin.Plugin;
   exports io.ebean.dbmigration;
 
   provides io.ebean.dbmigration.DbMigration with io.ebeaninternal.dbmigration.DefaultDbMigration;

ebean-ddl-generator/src/main/resources/META-INF/services/io.ebean.plugin.Plugin

@@ -0,0 +1 @@
+io.ebeaninternal.dbmigration.DbMigrationPlugin

ebean-ddl-generator/src/test/resources/application-test.properties

@@ -10,27 +10,3 @@ datasource.h2.url=jdbc:h2:mem:h2AutoTune
 datasource.pg.username=sa
 datasource.pg.password=
 datasource.pg.url=jdbc:h2:mem:h2AutoTune
-
-# parameters for migration test
-datasource.migrationtest.username=SA
-datasource.migrationtest.password=SA
-datasource.migrationtest.url=jdbc:h2:mem:migration
-ebean.migrationtest.applyPrefix=V
-ebean.migrationtest.ddl.generate=false
-ebean.migrationtest.ddl.run=false
-ebean.migrationtest.ddl.header=-- Migrationscripts for ebean unittest
-ebean.migrationtest.migration.appName=migrationtest
-ebean.migrationtest.migration.migrationPath=dbmigration/migrationtest
-ebean.migrationtest.migration.strict=true
-
-# parameters for migration test
-datasource.migrationtest-history.username=SA
-datasource.migrationtest-history.password=SA
-datasource.migrationtest-history.url=jdbc:h2:mem:migration
-ebean.migrationtest-history.applyPrefix=V
-ebean.migrationtest-history.ddl.generate=false
-ebean.migrationtest-history.ddl.run=false
-ebean.migrationtest-history.ddl.header=-- Migrationscripts for ebean unittest DbMigrationDropHistoryTest
-ebean.migrationtest-history.migration.appName=migrationtest-history
-ebean.migrationtest-history.migration.migrationPath=dbmigration/migrationtest-history
-ebean.migrationtest-history.migration.strict=true

ebean-test/src/test/java/io/ebean/xtest/dbmigration/DbMigrationDropHistoryTest.java

@@ -80,13 +80,11 @@ public static void main(String[] args) throws IOException {
     List<String> pendingDrops = migration.getPendingDrops();
     assertThat(pendingDrops).contains("1.1");
 
-    //System.setProperty("ddl.migration.pendingDropsFor", "1.1");
     migration.setGeneratePendingDrop("1.1");
     assertThat(migration.generateMigration()).isEqualTo("1.2__dropsFor_1.1");
     assertThatThrownBy(()->migration.generateMigration())
       .isInstanceOf(IllegalArgumentException.class)
       .hasMessageContaining("No 'pendingDrops'"); // subsequent call
-    System.clearProperty("ddl.migration.pendingDropsFor");
 
     server.shutdown();
     logger.info("end");