Introduce configuration parameter to control the generation of the evolution SQL files

(cherry picked from commit d2910e3)

Author: Vadim Vera

play-ebean/src/main/java/play/db/ebean/DefaultEbeanConfig.java

@@ -24,15 +24,24 @@
 /** Ebean server configuration. */
 @Singleton
 public class DefaultEbeanConfig implements EbeanConfig {
+  private final Boolean ddlGenerate;
 
   private final String defaultServer;
+
   private final Map<String, DatabaseConfig> serverConfigs;
 
-  public DefaultEbeanConfig(String defaultServer, Map<String, DatabaseConfig> serverConfigs) {
+  public DefaultEbeanConfig(
+      Boolean ddlGenerate, String defaultServer, Map<String, DatabaseConfig> serverConfigs) {
+    this.ddlGenerate = ddlGenerate;
     this.defaultServer = defaultServer;
     this.serverConfigs = serverConfigs;
   }
 
+  @Override
+  public Boolean ddlGenerate() {
+    return ddlGenerate;
+  }
+
   @Override
   public String defaultServer() {
     return defaultServer;
@@ -70,7 +79,6 @@ public EbeanConfig get() {
      * @return a config for Ebean servers.
      */
     public EbeanConfig parse() {
-
       EbeanParsedConfig ebeanConfig = EbeanParsedConfig.parseFromConfig(config);
 
       Map<String, DatabaseConfig> serverConfigs = new HashMap<>();
@@ -100,7 +108,8 @@ public EbeanConfig parse() {
         serverConfigs.put(key, serverConfig);
       }
 
-      return new DefaultEbeanConfig(ebeanConfig.getDefaultDatasource(), serverConfigs);
+      return new DefaultEbeanConfig(
+          ebeanConfig.getDdlGenerate(), ebeanConfig.getDefaultDatasource(), serverConfigs);
     }
 
     private void setServerConfigDataSource(String key, DatabaseConfig serverConfig) {

play-ebean/src/main/java/play/db/ebean/EbeanConfig.java

@@ -8,6 +8,7 @@
 import java.util.Map;
 
 public interface EbeanConfig {
+  Boolean ddlGenerate();
 
   String defaultServer();
 

play-ebean/src/main/java/play/db/ebean/EbeanDynamicEvolutions.java

@@ -64,6 +64,9 @@ public void create() {
     if (environment.isProd()) {
       return;
     }
+    if (config.ddlGenerate().equals(Boolean.FALSE)) {
+      return;
+    }
     config
         .serverConfigs()
         .forEach(

play-ebean/src/main/java/play/db/ebean/EbeanParsedConfig.java

@@ -17,14 +17,21 @@
  */
 public class EbeanParsedConfig {
 
+  private final Boolean ddlGenerate;
   private final String defaultDatasource;
   private final Map<String, List<String>> datasourceModels;
 
-  public EbeanParsedConfig(String defaultDatasource, Map<String, List<String>> datasourceModels) {
+  public EbeanParsedConfig(
+      Boolean ddlGenerate, String defaultDatasource, Map<String, List<String>> datasourceModels) {
+    this.ddlGenerate = ddlGenerate;
     this.defaultDatasource = defaultDatasource;
     this.datasourceModels = datasourceModels;
   }
 
+  public Boolean getDdlGenerate() {
+    return ddlGenerate;
+  }
+
   public String getDefaultDatasource() {
     return defaultDatasource;
   }
@@ -42,8 +49,9 @@ public Map<String, List<String>> getDatasourceModels() {
    */
   public static EbeanParsedConfig parseFromConfig(Config config) {
     Config playEbeanConfig = config.getConfig("play.ebean");
-    String defaultDatasource = playEbeanConfig.getString("defaultDatasource");
     String ebeanConfigKey = playEbeanConfig.getString("config");
+    Boolean ebeanDdlGenerateKey = playEbeanConfig.getBoolean("ddlGenerate");
+    String ebeanDefaultDatasourceKey = playEbeanConfig.getString("defaultDatasource");
 
     Map<String, List<String>> datasourceModels = new HashMap<>();
 
@@ -64,6 +72,6 @@ public static EbeanParsedConfig parseFromConfig(Config config) {
                 datasourceModels.put(key, models);
               });
     }
-    return new EbeanParsedConfig(defaultDatasource, datasourceModels);
+    return new EbeanParsedConfig(ebeanDdlGenerateKey, ebeanDefaultDatasourceKey, datasourceModels);
   }
 }

play-ebean/src/main/resources/reference.conf

@@ -7,6 +7,9 @@ play {
     # The key for ebean config
     config = "ebean"
 
+    # The key to control the generation of the evolution SQL files
+    ddlGenerate = true
+
     # The name of the default ebean datasource
     defaultDatasource = "default"
   }

play-ebean/src/test/java/play/db/ebean/EbeanParsedConfigTest.java

@@ -24,6 +24,7 @@ private EbeanParsedConfig parse(Map<String, ?> config) {
   @Test
   public void defaultConfig() {
     EbeanParsedConfig config = parse(Collections.emptyMap());
+    assertThat(config.getDdlGenerate(), equalTo(Boolean.TRUE));
     assertThat(config.getDefaultDatasource(), equalTo("default"));
     assertThat(config.getDatasourceModels().size(), equalTo(0));
   }
@@ -52,6 +53,12 @@ public void customDefault() {
     assertThat(config.getDefaultDatasource(), equalTo("custom"));
   }
 
+  @Test
+  public void disableDdlGenerate() {
+    EbeanParsedConfig config = parse(ImmutableMap.of("play.ebean.ddlGenerate", false));
+    assertThat(config.getDdlGenerate(), equalTo(Boolean.FALSE));
+  }
+
   @Test
   public void customConfig() {
     EbeanParsedConfig config =