This is an automated email from the ASF dual-hosted git repository.
nfilotto pushed a commit to branch main
in repository https://gitbox.apache.org/repos/asf/camel.git
The following commit(s) were added to refs/heads/main by this push:
new 6de84c7d41c CAMEL-20199: Remove synchronized block from Api
Collections (#14996)
6de84c7d41c is described below
commit 6de84c7d41cd0734f1052cd4d5c410f71695991d
Author: Nicolas Filotto <[email protected]>
AuthorDate: Thu Aug 1 18:07:15 2024 +0200
CAMEL-20199: Remove synchronized block from Api Collections (#14996)
---
.../camel/component/as2/internal/AS2ApiCollection.java | 13 ++++++-------
.../camel/component/box/internal/BoxApiCollection.java | 13 ++++++-------
.../braintree/internal/BraintreeApiCollection.java | 13 ++++++-------
.../camel/component/dhis2/internal/Dhis2ApiCollection.java | 13 ++++++-------
.../camel/component/fhir/internal/FhirApiCollection.java | 13 ++++++-------
.../calendar/internal/GoogleCalendarApiCollection.java | 13 ++++++-------
.../google/drive/internal/GoogleDriveApiCollection.java | 13 ++++++-------
.../google/mail/internal/GoogleMailApiCollection.java | 13 ++++++-------
.../google/sheets/internal/GoogleSheetsApiCollection.java | 13 ++++++-------
.../component/olingo2/internal/Olingo2ApiCollection.java | 13 ++++++-------
.../component/olingo4/internal/Olingo4ApiCollection.java | 13 ++++++-------
.../component/twilio/internal/TwilioApiCollection.java | 13 ++++++-------
.../component/zendesk/internal/ZendeskApiCollection.java | 13 ++++++-------
.../src/main/resources/api-collection.vm | 13 ++++++-------
14 files changed, 84 insertions(+), 98 deletions(-)
diff --git
a/components/camel-as2/camel-as2-component/src/generated/java/org/apache/camel/component/as2/internal/AS2ApiCollection.java
b/components/camel-as2/camel-as2-component/src/generated/java/org/apache/camel/component/as2/internal/AS2ApiCollection.java
index 66817a61d0b..a89d669d477 100644
---
a/components/camel-as2/camel-as2-component/src/generated/java/org/apache/camel/component/as2/internal/AS2ApiCollection.java
+++
b/components/camel-as2/camel-as2-component/src/generated/java/org/apache/camel/component/as2/internal/AS2ApiCollection.java
@@ -23,8 +23,6 @@ import org.apache.camel.support.component.ApiMethodHelper;
*/
public final class AS2ApiCollection extends ApiCollection<AS2ApiName,
AS2Configuration> {
- private static AS2ApiCollection collection;
-
private AS2ApiCollection() {
final Map<String, String> aliases = new HashMap<>();
final Map<AS2ApiName, ApiMethodHelper<? extends ApiMethod>> apiHelpers
= new EnumMap<>(AS2ApiName.class);
@@ -67,10 +65,11 @@ public final class AS2ApiCollection extends
ApiCollection<AS2ApiName, AS2Configu
return result;
}
- public static synchronized AS2ApiCollection getCollection() {
- if (collection == null) {
- collection = new AS2ApiCollection();
- }
- return collection;
+ public static AS2ApiCollection getCollection() {
+ return AS2ApiCollectionHolder.INSTANCE;
+ }
+
+ private static final class AS2ApiCollectionHolder {
+ private static final AS2ApiCollection INSTANCE = new
AS2ApiCollection();
}
}
diff --git
a/components/camel-box/camel-box-component/src/generated/java/org/apache/camel/component/box/internal/BoxApiCollection.java
b/components/camel-box/camel-box-component/src/generated/java/org/apache/camel/component/box/internal/BoxApiCollection.java
index dbd1ba35d63..6af7f6ad9f5 100644
---
a/components/camel-box/camel-box-component/src/generated/java/org/apache/camel/component/box/internal/BoxApiCollection.java
+++
b/components/camel-box/camel-box-component/src/generated/java/org/apache/camel/component/box/internal/BoxApiCollection.java
@@ -30,8 +30,6 @@ import org.apache.camel.support.component.ApiMethodHelper;
*/
public final class BoxApiCollection extends ApiCollection<BoxApiName,
BoxConfiguration> {
- private static BoxApiCollection collection;
-
private BoxApiCollection() {
final Map<String, String> aliases = new HashMap<>();
final Map<BoxApiName, ApiMethodHelper<? extends ApiMethod>> apiHelpers
= new EnumMap<>(BoxApiName.class);
@@ -206,10 +204,11 @@ public final class BoxApiCollection extends
ApiCollection<BoxApiName, BoxConfigu
return result;
}
- public static synchronized BoxApiCollection getCollection() {
- if (collection == null) {
- collection = new BoxApiCollection();
- }
- return collection;
+ public static BoxApiCollection getCollection() {
+ return BoxApiCollectionHolder.INSTANCE;
+ }
+
+ private static final class BoxApiCollectionHolder {
+ private static final BoxApiCollection INSTANCE = new
BoxApiCollection();
}
}
diff --git
a/components/camel-braintree/src/generated/java/org/apache/camel/component/braintree/internal/BraintreeApiCollection.java
b/components/camel-braintree/src/generated/java/org/apache/camel/component/braintree/internal/BraintreeApiCollection.java
index 09af0956627..835ac8ecf3e 100644
---
a/components/camel-braintree/src/generated/java/org/apache/camel/component/braintree/internal/BraintreeApiCollection.java
+++
b/components/camel-braintree/src/generated/java/org/apache/camel/component/braintree/internal/BraintreeApiCollection.java
@@ -39,8 +39,6 @@ import org.apache.camel.support.component.ApiMethodHelper;
*/
public final class BraintreeApiCollection extends
ApiCollection<BraintreeApiName, BraintreeConfiguration> {
- private static BraintreeApiCollection collection;
-
private BraintreeApiCollection() {
final Map<String, String> aliases = new HashMap<>();
final Map<BraintreeApiName, ApiMethodHelper<? extends ApiMethod>>
apiHelpers = new EnumMap<>(BraintreeApiName.class);
@@ -211,10 +209,11 @@ public final class BraintreeApiCollection extends
ApiCollection<BraintreeApiName
return result;
}
- public static synchronized BraintreeApiCollection getCollection() {
- if (collection == null) {
- collection = new BraintreeApiCollection();
- }
- return collection;
+ public static BraintreeApiCollection getCollection() {
+ return BraintreeApiCollectionHolder.INSTANCE;
+ }
+
+ private static final class BraintreeApiCollectionHolder {
+ private static final BraintreeApiCollection INSTANCE = new
BraintreeApiCollection();
}
}
diff --git
a/components/camel-dhis2/camel-dhis2-component/src/generated/java/org/apache/camel/component/dhis2/internal/Dhis2ApiCollection.java
b/components/camel-dhis2/camel-dhis2-component/src/generated/java/org/apache/camel/component/dhis2/internal/Dhis2ApiCollection.java
index 74cde27fb87..7617bbb02ca 100644
---
a/components/camel-dhis2/camel-dhis2-component/src/generated/java/org/apache/camel/component/dhis2/internal/Dhis2ApiCollection.java
+++
b/components/camel-dhis2/camel-dhis2-component/src/generated/java/org/apache/camel/component/dhis2/internal/Dhis2ApiCollection.java
@@ -25,8 +25,6 @@ import org.apache.camel.support.component.ApiMethodHelper;
*/
public final class Dhis2ApiCollection extends ApiCollection<Dhis2ApiName,
Dhis2Configuration> {
- private static Dhis2ApiCollection collection;
-
private Dhis2ApiCollection() {
final Map<String, String> aliases = new HashMap<>();
final Map<Dhis2ApiName, ApiMethodHelper<? extends ApiMethod>>
apiHelpers = new EnumMap<>(Dhis2ApiName.class);
@@ -85,10 +83,11 @@ public final class Dhis2ApiCollection extends
ApiCollection<Dhis2ApiName, Dhis2C
return result;
}
- public static synchronized Dhis2ApiCollection getCollection() {
- if (collection == null) {
- collection = new Dhis2ApiCollection();
- }
- return collection;
+ public static Dhis2ApiCollection getCollection() {
+ return Dhis2ApiCollectionHolder.INSTANCE;
+ }
+
+ private static final class Dhis2ApiCollectionHolder {
+ private static final Dhis2ApiCollection INSTANCE = new
Dhis2ApiCollection();
}
}
diff --git
a/components/camel-fhir/camel-fhir-component/src/generated/java/org/apache/camel/component/fhir/internal/FhirApiCollection.java
b/components/camel-fhir/camel-fhir-component/src/generated/java/org/apache/camel/component/fhir/internal/FhirApiCollection.java
index d805d65911c..c57462a24e6 100644
---
a/components/camel-fhir/camel-fhir-component/src/generated/java/org/apache/camel/component/fhir/internal/FhirApiCollection.java
+++
b/components/camel-fhir/camel-fhir-component/src/generated/java/org/apache/camel/component/fhir/internal/FhirApiCollection.java
@@ -33,8 +33,6 @@ import org.apache.camel.support.component.ApiMethodHelper;
*/
public final class FhirApiCollection extends ApiCollection<FhirApiName,
FhirConfiguration> {
- private static FhirApiCollection collection;
-
private FhirApiCollection() {
final Map<String, String> aliases = new HashMap<>();
final Map<FhirApiName, ApiMethodHelper<? extends ApiMethod>>
apiHelpers = new EnumMap<>(FhirApiName.class);
@@ -157,10 +155,11 @@ public final class FhirApiCollection extends
ApiCollection<FhirApiName, FhirConf
return result;
}
- public static synchronized FhirApiCollection getCollection() {
- if (collection == null) {
- collection = new FhirApiCollection();
- }
- return collection;
+ public static FhirApiCollection getCollection() {
+ return FhirApiCollectionHolder.INSTANCE;
+ }
+
+ private static final class FhirApiCollectionHolder {
+ private static final FhirApiCollection INSTANCE = new
FhirApiCollection();
}
}
diff --git
a/components/camel-google/camel-google-calendar/src/generated/java/org/apache/camel/component/google/calendar/internal/GoogleCalendarApiCollection.java
b/components/camel-google/camel-google-calendar/src/generated/java/org/apache/camel/component/google/calendar/internal/GoogleCalendarApiCollection.java
index fe3346bbbed..ea95156ad9b 100644
---
a/components/camel-google/camel-google-calendar/src/generated/java/org/apache/camel/component/google/calendar/internal/GoogleCalendarApiCollection.java
+++
b/components/camel-google/camel-google-calendar/src/generated/java/org/apache/camel/component/google/calendar/internal/GoogleCalendarApiCollection.java
@@ -28,8 +28,6 @@ import org.apache.camel.support.component.ApiMethodHelper;
*/
public final class GoogleCalendarApiCollection extends
ApiCollection<GoogleCalendarApiName, GoogleCalendarConfiguration> {
- private static GoogleCalendarApiCollection collection;
-
private GoogleCalendarApiCollection() {
final Map<String, String> aliases = new HashMap<>();
final Map<GoogleCalendarApiName, ApiMethodHelper<? extends ApiMethod>>
apiHelpers = new EnumMap<>(GoogleCalendarApiName.class);
@@ -112,10 +110,11 @@ public final class GoogleCalendarApiCollection extends
ApiCollection<GoogleCalen
return result;
}
- public static synchronized GoogleCalendarApiCollection getCollection() {
- if (collection == null) {
- collection = new GoogleCalendarApiCollection();
- }
- return collection;
+ public static GoogleCalendarApiCollection getCollection() {
+ return GoogleCalendarApiCollectionHolder.INSTANCE;
+ }
+
+ private static final class GoogleCalendarApiCollectionHolder {
+ private static final GoogleCalendarApiCollection INSTANCE = new
GoogleCalendarApiCollection();
}
}
diff --git
a/components/camel-google/camel-google-drive/src/generated/java/org/apache/camel/component/google/drive/internal/GoogleDriveApiCollection.java
b/components/camel-google/camel-google-drive/src/generated/java/org/apache/camel/component/google/drive/internal/GoogleDriveApiCollection.java
index 13471255dec..8f44525d2c6 100644
---
a/components/camel-google/camel-google-drive/src/generated/java/org/apache/camel/component/google/drive/internal/GoogleDriveApiCollection.java
+++
b/components/camel-google/camel-google-drive/src/generated/java/org/apache/camel/component/google/drive/internal/GoogleDriveApiCollection.java
@@ -30,8 +30,6 @@ import org.apache.camel.support.component.ApiMethodHelper;
*/
public final class GoogleDriveApiCollection extends
ApiCollection<GoogleDriveApiName, GoogleDriveConfiguration> {
- private static GoogleDriveApiCollection collection;
-
private GoogleDriveApiCollection() {
final Map<String, String> aliases = new HashMap<>();
final Map<GoogleDriveApiName, ApiMethodHelper<? extends ApiMethod>>
apiHelpers = new EnumMap<>(GoogleDriveApiName.class);
@@ -130,10 +128,11 @@ public final class GoogleDriveApiCollection extends
ApiCollection<GoogleDriveApi
return result;
}
- public static synchronized GoogleDriveApiCollection getCollection() {
- if (collection == null) {
- collection = new GoogleDriveApiCollection();
- }
- return collection;
+ public static GoogleDriveApiCollection getCollection() {
+ return GoogleDriveApiCollectionHolder.INSTANCE;
+ }
+
+ private static final class GoogleDriveApiCollectionHolder {
+ private static final GoogleDriveApiCollection INSTANCE = new
GoogleDriveApiCollection();
}
}
diff --git
a/components/camel-google/camel-google-mail/src/generated/java/org/apache/camel/component/google/mail/internal/GoogleMailApiCollection.java
b/components/camel-google/camel-google-mail/src/generated/java/org/apache/camel/component/google/mail/internal/GoogleMailApiCollection.java
index 44abcc90ab3..dee739496f1 100644
---
a/components/camel-google/camel-google-mail/src/generated/java/org/apache/camel/component/google/mail/internal/GoogleMailApiCollection.java
+++
b/components/camel-google/camel-google-mail/src/generated/java/org/apache/camel/component/google/mail/internal/GoogleMailApiCollection.java
@@ -27,8 +27,6 @@ import org.apache.camel.support.component.ApiMethodHelper;
*/
public final class GoogleMailApiCollection extends
ApiCollection<GoogleMailApiName, GoogleMailConfiguration> {
- private static GoogleMailApiCollection collection;
-
private GoogleMailApiCollection() {
final Map<String, String> aliases = new HashMap<>();
final Map<GoogleMailApiName, ApiMethodHelper<? extends ApiMethod>>
apiHelpers = new EnumMap<>(GoogleMailApiName.class);
@@ -103,10 +101,11 @@ public final class GoogleMailApiCollection extends
ApiCollection<GoogleMailApiNa
return result;
}
- public static synchronized GoogleMailApiCollection getCollection() {
- if (collection == null) {
- collection = new GoogleMailApiCollection();
- }
- return collection;
+ public static GoogleMailApiCollection getCollection() {
+ return GoogleMailApiCollectionHolder.INSTANCE;
+ }
+
+ private static final class GoogleMailApiCollectionHolder {
+ private static final GoogleMailApiCollection INSTANCE = new
GoogleMailApiCollection();
}
}
diff --git
a/components/camel-google/camel-google-sheets/src/generated/java/org/apache/camel/component/google/sheets/internal/GoogleSheetsApiCollection.java
b/components/camel-google/camel-google-sheets/src/generated/java/org/apache/camel/component/google/sheets/internal/GoogleSheetsApiCollection.java
index 68b588d423c..449cfadbb79 100644
---
a/components/camel-google/camel-google-sheets/src/generated/java/org/apache/camel/component/google/sheets/internal/GoogleSheetsApiCollection.java
+++
b/components/camel-google/camel-google-sheets/src/generated/java/org/apache/camel/component/google/sheets/internal/GoogleSheetsApiCollection.java
@@ -22,8 +22,6 @@ import org.apache.camel.support.component.ApiMethodHelper;
*/
public final class GoogleSheetsApiCollection extends
ApiCollection<GoogleSheetsApiName, GoogleSheetsConfiguration> {
- private static GoogleSheetsApiCollection collection;
-
private GoogleSheetsApiCollection() {
final Map<String, String> aliases = new HashMap<>();
final Map<GoogleSheetsApiName, ApiMethodHelper<? extends ApiMethod>>
apiHelpers = new EnumMap<>(GoogleSheetsApiName.class);
@@ -58,10 +56,11 @@ public final class GoogleSheetsApiCollection extends
ApiCollection<GoogleSheetsA
return result;
}
- public static synchronized GoogleSheetsApiCollection getCollection() {
- if (collection == null) {
- collection = new GoogleSheetsApiCollection();
- }
- return collection;
+ public static GoogleSheetsApiCollection getCollection() {
+ return GoogleSheetsApiCollectionHolder.INSTANCE;
+ }
+
+ private static final class GoogleSheetsApiCollectionHolder {
+ private static final GoogleSheetsApiCollection INSTANCE = new
GoogleSheetsApiCollection();
}
}
diff --git
a/components/camel-olingo2/camel-olingo2-component/src/generated/java/org/apache/camel/component/olingo2/internal/Olingo2ApiCollection.java
b/components/camel-olingo2/camel-olingo2-component/src/generated/java/org/apache/camel/component/olingo2/internal/Olingo2ApiCollection.java
index 3b67ba9ff29..c38140803d7 100644
---
a/components/camel-olingo2/camel-olingo2-component/src/generated/java/org/apache/camel/component/olingo2/internal/Olingo2ApiCollection.java
+++
b/components/camel-olingo2/camel-olingo2-component/src/generated/java/org/apache/camel/component/olingo2/internal/Olingo2ApiCollection.java
@@ -21,8 +21,6 @@ import org.apache.camel.support.component.ApiMethodHelper;
*/
public final class Olingo2ApiCollection extends ApiCollection<Olingo2ApiName,
Olingo2Configuration> {
- private static Olingo2ApiCollection collection;
-
private Olingo2ApiCollection() {
final Map<String, String> aliases = new HashMap<>();
final Map<Olingo2ApiName, ApiMethodHelper<? extends ApiMethod>>
apiHelpers = new EnumMap<>(Olingo2ApiName.class);
@@ -49,10 +47,11 @@ public final class Olingo2ApiCollection extends
ApiCollection<Olingo2ApiName, Ol
return result;
}
- public static synchronized Olingo2ApiCollection getCollection() {
- if (collection == null) {
- collection = new Olingo2ApiCollection();
- }
- return collection;
+ public static Olingo2ApiCollection getCollection() {
+ return Olingo2ApiCollectionHolder.INSTANCE;
+ }
+
+ private static final class Olingo2ApiCollectionHolder {
+ private static final Olingo2ApiCollection INSTANCE = new
Olingo2ApiCollection();
}
}
diff --git
a/components/camel-olingo4/camel-olingo4-component/src/generated/java/org/apache/camel/component/olingo4/internal/Olingo4ApiCollection.java
b/components/camel-olingo4/camel-olingo4-component/src/generated/java/org/apache/camel/component/olingo4/internal/Olingo4ApiCollection.java
index 5a486ce449d..927c182c6ec 100644
---
a/components/camel-olingo4/camel-olingo4-component/src/generated/java/org/apache/camel/component/olingo4/internal/Olingo4ApiCollection.java
+++
b/components/camel-olingo4/camel-olingo4-component/src/generated/java/org/apache/camel/component/olingo4/internal/Olingo4ApiCollection.java
@@ -21,8 +21,6 @@ import org.apache.camel.support.component.ApiMethodHelper;
*/
public final class Olingo4ApiCollection extends ApiCollection<Olingo4ApiName,
Olingo4Configuration> {
- private static Olingo4ApiCollection collection;
-
private Olingo4ApiCollection() {
final Map<String, String> aliases = new HashMap<>();
final Map<Olingo4ApiName, ApiMethodHelper<? extends ApiMethod>>
apiHelpers = new EnumMap<>(Olingo4ApiName.class);
@@ -49,10 +47,11 @@ public final class Olingo4ApiCollection extends
ApiCollection<Olingo4ApiName, Ol
return result;
}
- public static synchronized Olingo4ApiCollection getCollection() {
- if (collection == null) {
- collection = new Olingo4ApiCollection();
- }
- return collection;
+ public static Olingo4ApiCollection getCollection() {
+ return Olingo4ApiCollectionHolder.INSTANCE;
+ }
+
+ private static final class Olingo4ApiCollectionHolder {
+ private static final Olingo4ApiCollection INSTANCE = new
Olingo4ApiCollection();
}
}
diff --git
a/components/camel-twilio/src/generated/java/org/apache/camel/component/twilio/internal/TwilioApiCollection.java
b/components/camel-twilio/src/generated/java/org/apache/camel/component/twilio/internal/TwilioApiCollection.java
index c26e7025c26..a2a49d81b19 100644
---
a/components/camel-twilio/src/generated/java/org/apache/camel/component/twilio/internal/TwilioApiCollection.java
+++
b/components/camel-twilio/src/generated/java/org/apache/camel/component/twilio/internal/TwilioApiCollection.java
@@ -74,8 +74,6 @@ import org.apache.camel.support.component.ApiMethodHelper;
*/
public final class TwilioApiCollection extends ApiCollection<TwilioApiName,
TwilioConfiguration> {
- private static TwilioApiCollection collection;
-
private TwilioApiCollection() {
final Map<String, String> aliases = new HashMap<>();
final Map<TwilioApiName, ApiMethodHelper<? extends ApiMethod>>
apiHelpers = new EnumMap<>(TwilioApiName.class);
@@ -796,10 +794,11 @@ public final class TwilioApiCollection extends
ApiCollection<TwilioApiName, Twil
return result;
}
- public static synchronized TwilioApiCollection getCollection() {
- if (collection == null) {
- collection = new TwilioApiCollection();
- }
- return collection;
+ public static TwilioApiCollection getCollection() {
+ return TwilioApiCollectionHolder.INSTANCE;
+ }
+
+ private static final class TwilioApiCollectionHolder {
+ private static final TwilioApiCollection INSTANCE = new
TwilioApiCollection();
}
}
diff --git
a/components/camel-zendesk/src/generated/java/org/apache/camel/component/zendesk/internal/ZendeskApiCollection.java
b/components/camel-zendesk/src/generated/java/org/apache/camel/component/zendesk/internal/ZendeskApiCollection.java
index 072078e3cfd..79d54c979aa 100644
---
a/components/camel-zendesk/src/generated/java/org/apache/camel/component/zendesk/internal/ZendeskApiCollection.java
+++
b/components/camel-zendesk/src/generated/java/org/apache/camel/component/zendesk/internal/ZendeskApiCollection.java
@@ -21,8 +21,6 @@ import org.apache.camel.support.component.ApiMethodHelper;
*/
public final class ZendeskApiCollection extends ApiCollection<ZendeskApiName,
ZendeskConfiguration> {
- private static ZendeskApiCollection collection;
-
private ZendeskApiCollection() {
final Map<String, String> aliases = new HashMap<>();
final Map<ZendeskApiName, ApiMethodHelper<? extends ApiMethod>>
apiHelpers = new EnumMap<>(ZendeskApiName.class);
@@ -49,10 +47,11 @@ public final class ZendeskApiCollection extends
ApiCollection<ZendeskApiName, Ze
return result;
}
- public static synchronized ZendeskApiCollection getCollection() {
- if (collection == null) {
- collection = new ZendeskApiCollection();
- }
- return collection;
+ public static ZendeskApiCollection getCollection() {
+ return ZendeskApiCollectionHolder.INSTANCE;
+ }
+
+ private static final class ZendeskApiCollectionHolder {
+ private static final ZendeskApiCollection INSTANCE = new
ZendeskApiCollection();
}
}
diff --git
a/tooling/maven/camel-api-component-maven-plugin/src/main/resources/api-collection.vm
b/tooling/maven/camel-api-component-maven-plugin/src/main/resources/api-collection.vm
index e4eb9a50ff0..d6067ad77dd 100644
---
a/tooling/maven/camel-api-component-maven-plugin/src/main/resources/api-collection.vm
+++
b/tooling/maven/camel-api-component-maven-plugin/src/main/resources/api-collection.vm
@@ -41,8 +41,6 @@ import org.apache.camel.support.component.ApiMethodHelper;
*/
public final class $collectionName extends ApiCollection<${apiNameEnum},
${componentConfig}> {
- private static $collectionName collection;
-
private ${collectionName}() {
final Map<String, String> aliases = new HashMap<>();
final Map<${apiNameEnum}, ApiMethodHelper<? extends ApiMethod>>
apiHelpers = new EnumMap<>(${apiNameEnum}.class);
@@ -78,10 +76,11 @@ public final class $collectionName extends
ApiCollection<${apiNameEnum}, ${compo
return result;
}
- public static synchronized $collectionName getCollection() {
- if (collection == null) {
- collection = new $collectionName();
- }
- return collection;
+ public static $collectionName getCollection() {
+ return ${collectionName}Holder.INSTANCE;
+ }
+
+ private static final class ${collectionName}Holder {
+ private static final $collectionName INSTANCE = new $collectionName();
}
}
