Declared JDBC operation compiled flag as volatile

Issue: SPR-13617

Author: jhoeller

spring-jdbc/src/main/java/org/springframework/jdbc/core/simple/AbstractJdbcCall.java

@@ -67,7 +67,7 @@ public abstract class AbstractJdbcCall {
 	 * Has this operation been compiled? Compilation means at least checking
 	 * that a DataSource or JdbcTemplate has been provided.
 	 */
-	private boolean compiled = false;
+	private volatile boolean compiled = false;
 
 	/** The generated string used for call statement */
 	private String callString;
@@ -329,7 +329,7 @@ protected void onCompileInternal() {
 
 	/**
 	 * Is this operation "compiled"?
-	 * @return whether this operation is compiled, and ready to use.
+	 * @return whether this operation is compiled and ready to use
 	 */
 	public boolean isCompiled() {
 		return this.compiled;

spring-jdbc/src/main/java/org/springframework/jdbc/core/simple/AbstractJdbcInsert.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2015 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -80,7 +80,7 @@ public abstract class AbstractJdbcInsert {
 	 * Has this operation been compiled? Compilation means at least checking
 	 * that a DataSource or JdbcTemplate has been provided.
 	 */
-	private boolean compiled = false;
+	private volatile boolean compiled = false;
 
 	/** The generated string used for insert statement */
 	private String insertString;
@@ -296,7 +296,7 @@ protected void onCompileInternal() {
 
 	/**
 	 * Is this operation "compiled"?
-	 * @return whether this operation is compiled, and ready to use.
+	 * @return whether this operation is compiled and ready to use
 	 */
 	public boolean isCompiled() {
 		return this.compiled;

spring-jdbc/src/main/java/org/springframework/jdbc/object/RdbmsOperation.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2014 the original author or authors.
+ * Copyright 2002-2015 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -81,7 +81,7 @@ public abstract class RdbmsOperation implements InitializingBean {
 	 * least checking that a DataSource and sql have been provided,
 	 * but subclasses may also implement their own custom validation.
 	 */
-	private boolean compiled;
+	private volatile boolean compiled;
 
 
 	/**
@@ -350,7 +350,7 @@ public final void compile() throws InvalidDataAccessApiUsageException {
 	 * Is this operation "compiled"? Compilation, as in JDO,
 	 * means that the operation is fully configured, and ready to use.
 	 * The exact meaning of compilation will vary between subclasses.
-	 * @return whether this operation is compiled, and ready to use.
+	 * @return whether this operation is compiled and ready to use
 	 */
 	public boolean isCompiled() {
 		return this.compiled;