That's actually how I've assumed it works and was never surprised by it. I never bothered to look into it, though, as I usually didn't need to worry about it.
On 26 August 2014 08:32, Gary Gregory <[email protected]> wrote: > On Tue, Aug 26, 2014 at 1:11 AM, Remko Popma <[email protected]> > wrote: > >> Is it okay to use serialVersionUID = 1L for real (non-test) components? >> (I only have a vague idea how this is used internally...) >> > > You can use whatever serialVersionUID long you want if you declare it. > > Since the classes were not Serializable before, there is no compatibility > issue. > > If the class had been Serializablebut no serialVersionUID existed, then > the runtime would generate one for you, so then it would make sense to use > that serialVersionUID in the declaration. With 1L, it's easier to "see" > that it is the 1st version, we can bump it to 2L, 3L and so on as need be. > > Gary > > Gary > > >> >> Sent from my iPhone >> >> > On 2014/08/25, at 23:22, [email protected] wrote: >> > >> > Author: ggregory >> > Date: Mon Aug 25 21:22:25 2014 >> > New Revision: 1620456 >> > >> > URL: http://svn.apache.org/r1620456 >> > Log: >> > [LOG4J2-800] All life cycle implementations should be serializable. >> > >> > Modified: >> > >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/async/AsyncLoggerConfig.java >> > >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/async/AsyncLoggerContext.java >> > >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/LoggerConfig.java >> > >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/NullConfiguration.java >> > >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/json/JsonConfiguration.java >> > >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/xml/XmlConfiguration.java >> > >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/yaml/YamlConfiguration.java >> > >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/StructuredDataFilter.java >> > >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/ThreadContextMapFilter.java >> > >> > Modified: >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/async/AsyncLoggerConfig.java >> > URL: >> http://svn.apache.org/viewvc/logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/async/AsyncLoggerConfig.java?rev=1620456&r1=1620455&r2=1620456&view=diff >> > >> ============================================================================== >> > --- >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/async/AsyncLoggerConfig.java >> (original) >> > +++ >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/async/AsyncLoggerConfig.java >> Mon Aug 25 21:22:25 2014 >> > @@ -67,6 +67,8 @@ import org.apache.logging.log4j.util.Str >> > @Plugin(name = "asyncLogger", category = "Core", printObject = true) >> > public class AsyncLoggerConfig extends LoggerConfig { >> > >> > + private static final long serialVersionUID = 1L; >> > + >> > private AsyncLoggerConfigHelper helper; >> > >> > /** >> > @@ -204,6 +206,8 @@ public class AsyncLoggerConfig extends L >> > @Plugin(name = "asyncRoot", category = "Core", printObject = true) >> > public static class RootLogger extends LoggerConfig { >> > >> > + private static final long serialVersionUID = 1L; >> > + >> > @PluginFactory >> > public static LoggerConfig createLogger( >> > @PluginAttribute("additivity") final String additivity, >> > >> > Modified: >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/async/AsyncLoggerContext.java >> > URL: >> http://svn.apache.org/viewvc/logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/async/AsyncLoggerContext.java?rev=1620456&r1=1620455&r2=1620456&view=diff >> > >> ============================================================================== >> > --- >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/async/AsyncLoggerContext.java >> (original) >> > +++ >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/async/AsyncLoggerContext.java >> Mon Aug 25 21:22:25 2014 >> > @@ -27,6 +27,8 @@ import org.apache.logging.log4j.message. >> > */ >> > public class AsyncLoggerContext extends LoggerContext { >> > >> > + private static final long serialVersionUID = 1L; >> > + >> > public AsyncLoggerContext(final String name) { >> > super(name); >> > } >> > >> > Modified: >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/LoggerConfig.java >> > URL: >> http://svn.apache.org/viewvc/logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/LoggerConfig.java?rev=1620456&r1=1620455&r2=1620456&view=diff >> > >> ============================================================================== >> > --- >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/LoggerConfig.java >> (original) >> > +++ >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/LoggerConfig.java >> Mon Aug 25 21:22:25 2014 >> > @@ -490,6 +490,8 @@ public class LoggerConfig extends Abstra >> > @Plugin(name = "root", category = "Core", printObject = true) >> > public static class RootLogger extends LoggerConfig { >> > >> > + private static final long serialVersionUID = 1L; >> > + >> > @PluginFactory >> > public static LoggerConfig createLogger( >> > @PluginAttribute("additivity") final String additivity, >> > >> > Modified: >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/NullConfiguration.java >> > URL: >> http://svn.apache.org/viewvc/logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/NullConfiguration.java?rev=1620456&r1=1620455&r2=1620456&view=diff >> > >> ============================================================================== >> > --- >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/NullConfiguration.java >> (original) >> > +++ >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/NullConfiguration.java >> Mon Aug 25 21:22:25 2014 >> > @@ -23,6 +23,7 @@ import org.apache.logging.log4j.Level; >> > */ >> > public class NullConfiguration extends AbstractConfiguration { >> > >> > + private static final long serialVersionUID = 1L; >> > public static final String NULL_NAME = "Null"; >> > >> > public NullConfiguration() { >> > >> > Modified: >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/json/JsonConfiguration.java >> > URL: >> http://svn.apache.org/viewvc/logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/json/JsonConfiguration.java?rev=1620456&r1=1620455&r2=1620456&view=diff >> > >> ============================================================================== >> > --- >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/json/JsonConfiguration.java >> (original) >> > +++ >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/json/JsonConfiguration.java >> Mon Aug 25 21:22:25 2014 >> > @@ -47,6 +47,7 @@ import com.fasterxml.jackson.databind.Ob >> > */ >> > public class JsonConfiguration extends AbstractConfiguration implements >> Reconfigurable { >> > >> > + private static final long serialVersionUID = 1L; >> > private static final String[] VERBOSE_CLASSES = new String[] { >> ResolverUtil.class.getName() }; >> > private final List<Status> status = new ArrayList<Status>(); >> > private JsonNode root; >> > >> > Modified: >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/xml/XmlConfiguration.java >> > URL: >> http://svn.apache.org/viewvc/logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/xml/XmlConfiguration.java?rev=1620456&r1=1620455&r2=1620456&view=diff >> > >> ============================================================================== >> > --- >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/xml/XmlConfiguration.java >> (original) >> > +++ >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/xml/XmlConfiguration.java >> Mon Aug 25 21:22:25 2014 >> > @@ -62,6 +62,8 @@ import org.xml.sax.SAXException; >> > */ >> > public class XmlConfiguration extends AbstractConfiguration implements >> Reconfigurable { >> > >> > + private static final long serialVersionUID = 1L; >> > + >> > private static final String XINCLUDE_FIXUP_LANGUAGE = " >> http://apache.org/xml/features/xinclude/fixup-language";; >> > private static final String XINCLUDE_FIXUP_BASE_URIS = " >> http://apache.org/xml/features/xinclude/fixup-base-uris";; >> > private static final String[] VERBOSE_CLASSES = new String[] { >> ResolverUtil.class.getName() }; >> > >> > Modified: >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/yaml/YamlConfiguration.java >> > URL: >> http://svn.apache.org/viewvc/logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/yaml/YamlConfiguration.java?rev=1620456&r1=1620455&r2=1620456&view=diff >> > >> ============================================================================== >> > --- >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/yaml/YamlConfiguration.java >> (original) >> > +++ >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/config/yaml/YamlConfiguration.java >> Mon Aug 25 21:22:25 2014 >> > @@ -25,6 +25,8 @@ import com.fasterxml.jackson.dataformat. >> > >> > public class YamlConfiguration extends JsonConfiguration { >> > >> > + private static final long serialVersionUID = 1L; >> > + >> > public YamlConfiguration(final ConfigurationSource configSource) { >> > super(configSource); >> > } >> > >> > Modified: >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/StructuredDataFilter.java >> > URL: >> http://svn.apache.org/viewvc/logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/StructuredDataFilter.java?rev=1620456&r1=1620455&r2=1620456&view=diff >> > >> ============================================================================== >> > --- >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/StructuredDataFilter.java >> (original) >> > +++ >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/StructuredDataFilter.java >> Mon Aug 25 21:22:25 2014 >> > @@ -39,6 +39,8 @@ import org.apache.logging.log4j.message. >> > @Plugin(name = "StructuredDataFilter", category = "Core", elementType = >> "filter", printObject = true) >> > public final class StructuredDataFilter extends MapFilter { >> > >> > + private static final long serialVersionUID = 1L; >> > + >> > private StructuredDataFilter(final Map<String, List<String>> map, >> final boolean oper, final Result onMatch, >> > final Result onMismatch) { >> > super(map, oper, onMatch, onMismatch); >> > >> > Modified: >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/ThreadContextMapFilter.java >> > URL: >> http://svn.apache.org/viewvc/logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/ThreadContextMapFilter.java?rev=1620456&r1=1620455&r2=1620456&view=diff >> > >> ============================================================================== >> > --- >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/ThreadContextMapFilter.java >> (original) >> > +++ >> logging/log4j/log4j2/trunk/log4j-core/src/main/java/org/apache/logging/log4j/core/filter/ThreadContextMapFilter.java >> Mon Aug 25 21:22:25 2014 >> > @@ -40,6 +40,8 @@ import org.apache.logging.log4j.message. >> > @Plugin(name = "ThreadContextMapFilter", category = "Core", elementType >> = "filter", printObject = true) >> > public class ThreadContextMapFilter extends MapFilter { >> > >> > + private static final long serialVersionUID = 1L; >> > + >> > private final String key; >> > private final String value; >> > >> > >> > >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: [email protected] >> For additional commands, e-mail: [email protected] >> >> > > > -- > E-Mail: [email protected] | [email protected] > Java Persistence with Hibernate, Second Edition > <http://www.manning.com/bauer3/> > JUnit in Action, Second Edition <http://www.manning.com/tahchiev/> > Spring Batch in Action <http://www.manning.com/templier/> > Blog: http://garygregory.wordpress.com > Home: http://garygregory.com/ > Tweet! http://twitter.com/GaryGregory > -- Matt Sicker <[email protected]>
