Minor clean ups in DataSource Connection Pool related code

fineract-provider/src/main/java/org/apache/fineract/infrastructure/core/boot/JDBCDriverConfig.java

@@ -42,10 +42,10 @@ public class JDBCDriverConfig {
     @PostConstruct
     protected void init() {
         Environment environment = context.getEnvironment() ;
-        driverClassName = (String)environment.getProperty(DRIVER_CLASS_PROPERTYNAME) ;
+        driverClassName = environment.getProperty(DRIVER_CLASS_PROPERTYNAME) ;
-        protocol = (String) environment.getProperty(PROTOCOL_PROPERTYNAME) ;
+        protocol = environment.getProperty(PROTOCOL_PROPERTYNAME) ;
-        subProtocol = (String) environment.getProperty(SUBPROTOCOL_PROPERTYNAME) ;
+        subProtocol = environment.getProperty(SUBPROTOCOL_PROPERTYNAME) ;
-        port = Integer.parseInt((String) environment.getProperty(PORT_PROPERTYNAME)) ;
+        port = Integer.parseInt(environment.getProperty(PORT_PROPERTYNAME)) ;
     }
 
     public String getDriverClassName() {
@@ -69,5 +69,4 @@ public class JDBCDriverConfig {
                 .append('/').append(schemaName).toString();
         return url;
     }
-
 }

fineract-provider/src/main/java/org/apache/fineract/infrastructure/core/domain/FineractPlatformTenant.java

@@ -54,5 +54,4 @@ public class FineractPlatformTenant {
     public FineractPlatformTenantConnection getConnection() {
         return connection;
     }
-
 }

fineract-provider/src/main/java/org/apache/fineract/infrastructure/core/domain/FineractPlatformTenantConnection.java

@@ -20,8 +20,7 @@ package org.apache.fineract.infrastructure.core.domain;
 
 
 /**
- * Holds DB server connection details.
+ * Holds Tenant's DB server connection connection details.
- *
  */
 public class FineractPlatformTenantConnection {
 
@@ -77,161 +76,78 @@ public class FineractPlatformTenantConnection {
         this.testOnBorrow=tesOnBorrow;
     }
 
-    //The Connection Protocol should be built based on jdbc.properties. We can't hard code this here and also, constructing protocol is not this class
-    //responsibility
-    /*public String databaseURL() {
-        final String url = new StringBuilder("jdbc:mysql:thin://").append(this.schemaServer).append(':').append(this.schemaServerPort)
-                .append('/').append(this.schemaName).toString();
-        return url;
-    }*/
-
-    /**
-     * @return the schemaServer
-     */
     public String getSchemaServer() {
         return this.schemaServer;
     }
 
-
-    /**
-     * @return the schemaServerPort
-     */
     public String getSchemaServerPort() {
         return this.schemaServerPort;
     }
 
-
-    /**
-     * @return the schemaUsername
-     */
     public String getSchemaUsername() {
         return this.schemaUsername;
     }
 
-
-    /**
-     * @return the schemaPassword
-     */
     public String getSchemaPassword() {
         return this.schemaPassword;
     }
 
-
-    /**
-     * @return the autoUpdateEnabled
-     */
     public boolean isAutoUpdateEnabled() {
         return this.autoUpdateEnabled;
     }
 
-
-    /**
-     * @return the initialSize
-     */
     public int getInitialSize() {
         return this.initialSize;
     }
 
-
-    /**
-     * @return the validationInterval
-     */
     public long getValidationInterval() {
         return this.validationInterval;
     }
 
-
-    /**
-     * @return the removeAbandoned
-     */
     public boolean isRemoveAbandoned() {
         return this.removeAbandoned;
     }
 
-
-    /**
-     * @return the removeAbandonedTimeout
-     */
     public int getRemoveAbandonedTimeout() {
         return this.removeAbandonedTimeout;
     }
 
-
-    /**
-     * @return the logAbandoned
-     */
     public boolean isLogAbandoned() {
         return this.logAbandoned;
     }
 
-
-    /**
-     * @return the abandonWhenPercentageFull
-     */
     public int getAbandonWhenPercentageFull() {
         return this.abandonWhenPercentageFull;
     }
 
-
-    /**
-     * @return the maxActive
-     */
     public int getMaxActive() {
         return this.maxActive;
     }
 
-
-    /**
-     * @return the minIdle
-     */
     public int getMinIdle() {
         return this.minIdle;
     }
 
-
-    /**
-     * @return the maxIdle
-     */
     public int getMaxIdle() {
         return this.maxIdle;
     }
 
-
-    /**
-     * @return the suspectTimeout
-     */
     public int getSuspectTimeout() {
         return this.suspectTimeout;
     }
 
-
-    /**
-     * @return the timeBetweenEvictionRunsMillis
-     */
     public int getTimeBetweenEvictionRunsMillis() {
         return this.timeBetweenEvictionRunsMillis;
     }
 
-
-    /**
-     * @return the minEvictableIdleTimeMillis
-     */
     public int getMinEvictableIdleTimeMillis() {
         return this.minEvictableIdleTimeMillis;
     }
 
-
-    /**
-     * @return the maxRetriesOnDeadlock
-     */
     public int getMaxRetriesOnDeadlock() {
         return this.maxRetriesOnDeadlock;
     }
 
-
-    /**
-     * @return the maxIntervalBetweenRetries
-     */
     public int getMaxIntervalBetweenRetries() {
         return this.maxIntervalBetweenRetries;
     }

fineract-provider/src/main/java/org/apache/fineract/infrastructure/core/service/TomcatJdbcDataSourcePerTenantService.java

@@ -31,7 +31,7 @@ import org.springframework.beans.factory.annotation.Qualifier;
 import org.springframework.stereotype.Service;
 
 /**
- * Implementation that returns a new or existing tomcat 7 jdbc connection pool
+ * Implementation that returns a new or existing connection pool
  * datasource based on the tenant details stored in a {@link ThreadLocal}
  * variable for this request.
  *
@@ -54,7 +54,6 @@ public class TomcatJdbcDataSourcePerTenantService implements RoutingDataSourceSe
 
     @Override
     public DataSource retrieveDataSource() {
-
         // default to tenant database datasource
         DataSource tenantDataSource = this.tenantDataSource;
 
@@ -63,12 +62,10 @@ public class TomcatJdbcDataSourcePerTenantService implements RoutingDataSourceSe
             final FineractPlatformTenantConnection tenantConnection = tenant.getConnection();
 
             synchronized (this.tenantToDataSourceMap) {
-                // if tenantConnection information available switch to
+                // if tenantConnection information available switch to the appropriate datasource for that tenant.
-                // appropriate
+                DataSource possibleDS = this.tenantToDataSourceMap.get(tenantConnection.getConnectionId());
-                // datasource
+                if (possibleDS != null) {
-                // for that tenant.
+                    tenantDataSource = possibleDS;
-                if (this.tenantToDataSourceMap.containsKey(tenantConnection.getConnectionId())) {
-                    tenantDataSource = this.tenantToDataSourceMap.get(tenantConnection.getConnectionId());
                 } else {
                     tenantDataSource = createNewDataSourceFor(tenantConnection);
                     this.tenantToDataSourceMap.put(tenantConnection.getConnectionId(), tenantDataSource);
@@ -79,12 +76,8 @@ public class TomcatJdbcDataSourcePerTenantService implements RoutingDataSourceSe
         return tenantDataSource;
     }
 
-    // creates the data source oltp and report databases
+    // creates the tenant data source for the oltp and report database
     private DataSource createNewDataSourceFor(final FineractPlatformTenantConnection tenantConnectionObj) {
-        // see
-        // http://www.tomcatexpert.com/blog/2010/04/01/configuring-jdbc-pool-high-concurrency
-
-        // see also org.apache.fineract.DataSourceProperties.setDefaults()
         String jdbcUrl = this.driverConfig.constructProtocol(tenantConnectionObj.getSchemaServer(), tenantConnectionObj.getSchemaServerPort(), tenantConnectionObj.getSchemaName());
 
         HikariConfig config = new HikariConfig();
@@ -93,12 +86,12 @@ public class TomcatJdbcDataSourcePerTenantService implements RoutingDataSourceSe
         config.setJdbcUrl(jdbcUrl);
         config.setUsername(tenantConnectionObj.getSchemaUsername());
         config.setPassword(tenantConnectionObj.getSchemaPassword());
-
         config.setConnectionTestQuery("SELECT 1");
         config.setValidationTimeout(tenantConnectionObj.getValidationInterval());
-
         config.setAutoCommit(true);
 
+        // https://github.com/brettwooldridge/HikariCP/wiki/MySQL-Configuration
+
         return new HikariDataSource(config);
     }
 }