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[#1223] Cache ExecuteListener classes for performance

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This commit is contained in:
Lukas Eder 2012-03-11 11:06:21 +00:00
parent 1aa4196968
commit e3e0bf638f
1 changed files with 26 additions and 9 deletions
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35
jOOQ/src/main/java/org/jooq/impl/Util.java
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@ -54,6 +54,8 @@ import java.sql.Statement;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import javax.persistence.Column;
import javax.persistence.Entity;
@ -94,13 +96,18 @@ final class Util {
* The default escape character for <code>[a] LIKE [b] ESCAPE [...]</code>
* clauses.
*/
static final char ESCAPE = '!';
static final char ESCAPE = '!';
/**
* Indicating whether JPA (<code>javax.persistence</code>) is on the
* classpath.
*/
private static Boolean isJPAAvailable;
private static Boolean isJPAAvailable;
/**
* A cache for {@link ExecuteListener} classes
*/
private static final Map<String, Class<?>> EXECUTE_LISTENERS = new ConcurrentHashMap<String, Class<?>>();
/**
* Create a new Oracle-style VARRAY {@link ArrayRecord}
@ -842,18 +849,28 @@ final class Util {
}
for (String listener : configuration.getSettings().getExecuteListeners()) {
try {
// [#1170] TODO: Cache these classes?
result.add((ExecuteListener) Class.forName(listener).newInstance());
}
catch (Exception e) {
throw new RuntimeException(e);
}
result.add(getListener(listener));
}
return result;
}
private static final ExecuteListener getListener(String name) {
try {
Class<?> type = EXECUTE_LISTENERS.get(name);
if (type == null) {
type = Class.forName(name);
EXECUTE_LISTENERS.put(name, type);
}
return (ExecuteListener) type.newInstance();
}
catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* Wrap a piece of SQL code in parentheses, if not wrapped already
*/