performance.po

hibernate-distribution-3.3.1.GA-dist.zip源码

#: performance.xml:641
#, no-c-format
msgid "yes (replication)"
msgstr "yes (replication)"

#. Tag: entry
#: performance.xml:642
#, no-c-format
msgid "yes (clock sync req.)"
msgstr "yes (clock sync req.)"

#. Tag: title
#: performance.xml:649
#, no-c-format
msgid "Cache mappings"
msgstr "Cache mappings"

#. Tag: para
#: performance.xml:651
#, no-c-format
msgid ""
"The <literal>&lt;cache&gt;</literal> element of a class or collection "
"mapping has the following form:"
msgstr ""
"The <literal>&lt;cache&gt;</literal> element of a class or collection "
"mapping has the following form:"

#. Tag: programlisting
#: performance.xml:662
#, no-c-format
msgid ""
"<![CDATA[<cache \n"
"    usage=\"transactional|read-write|nonstrict-read-write|read-only\"\n"
"    region=\"RegionName\"\n"
"    include=\"all|non-lazy\"\n"
"/>]]>"
msgstr ""

#. Tag: para
#: performance.xml:665
#, no-c-format
msgid ""
"<literal>usage</literal> (required) specifies the caching strategy: "
"<literal>transactional</literal>, <literal>read-write</literal>, "
"<literal>nonstrict-read-write</literal> or <literal>read-only</literal>"
msgstr ""
"<literal>usage</literal> (required) specifies the caching strategy: "
"<literal>transactional</literal>, <literal>read-write</literal>, "
"<literal>nonstrict-read-write</literal> or <literal>read-only</literal>"

#. Tag: para
#: performance.xml:674
#, no-c-format
msgid ""
"<literal>region</literal> (optional, defaults to the class or collection "
"role name) specifies the name of the second level cache region"
msgstr ""
"<literal>region</literal> (optional, defaults to the class or collection "
"role name) specifies the name of the second level cache region"

#. Tag: para
#: performance.xml:681
#, no-c-format
msgid ""
"<literal>include</literal> (optional, defaults to <literal>all</literal>) "
"<literal>non-lazy</literal> specifies that properties of the entity mapped "
"with <literal>lazy=\"true\"</literal> may not be cached when attribute-level "
"lazy fetching is enabled"
msgstr ""
"<literal>include</literal> (optional, defaults to <literal>all</literal>) "
"<literal>non-lazy</literal> specifies that properties of the entity mapped "
"with <literal>lazy=\"true\"</literal> may not be cached when attribute-level "
"lazy fetching is enabled"

#. Tag: para
#: performance.xml:691
#, no-c-format
msgid ""
"Alternatively (preferrably?), you may specify <literal>&lt;class-cache&gt;</"
"literal> and <literal>&lt;collection-cache&gt;</literal> elements in "
"<literal>hibernate.cfg.xml</literal>."
msgstr ""
"Alternatively (preferrably?), you may specify <literal>&lt;class-cache&gt;</"
"literal> and <literal>&lt;collection-cache&gt;</literal> elements in "
"<literal>hibernate.cfg.xml</literal>."

#. Tag: para
#: performance.xml:696
#, no-c-format
msgid ""
"The <literal>usage</literal> attribute specifies a <emphasis>cache "
"concurrency strategy</emphasis>."
msgstr ""
"The <literal>usage</literal> attribute specifies a <emphasis>cache "
"concurrency strategy</emphasis>."

#. Tag: title
#: performance.xml:703
#, no-c-format
msgid "Strategy: read only"
msgstr "Strategy: read only"

#. Tag: para
#: performance.xml:705
#, no-c-format
msgid ""
"If your application needs to read but never modify instances of a persistent "
"class, a <literal>read-only</literal> cache may be used. This is the "
"simplest and best performing strategy. It's even perfectly safe for use in a "
"cluster."
msgstr ""
"If your application needs to read but never modify instances of a persistent "
"class, a <literal>read-only</literal> cache may be used. This is the "
"simplest and best performing strategy. It's even perfectly safe for use in a "
"cluster."

#. Tag: programlisting
#: performance.xml:711
#, no-c-format
msgid ""
"<![CDATA[<class name=\"eg.Immutable\" mutable=\"false\">\n"
"    <cache usage=\"read-only\"/>\n"
"    ....\n"
"</class>]]>"
msgstr ""

#. Tag: title
#: performance.xml:717
#, no-c-format
msgid "Strategy: read/write"
msgstr "Strategy: read/write"

#. Tag: para
#: performance.xml:719
#, no-c-format
msgid ""
"If the application needs to update data, a <literal>read-write</literal> "
"cache might be appropriate. This cache strategy should never be used if "
"serializable transaction isolation level is required. If the cache is used "
"in a JTA environment, you must specify the property <literal>hibernate."
"transaction.manager_lookup_class</literal>, naming a strategy for obtaining "
"the JTA <literal>TransactionManager</literal>. In other environments, you "
"should ensure that the transaction is completed when <literal>Session.close()"
"</literal> or <literal>Session.disconnect()</literal> is called. If you wish "
"to use this strategy in a cluster, you should ensure that the underlying "
"cache implementation supports locking. The built-in cache providers do "
"<emphasis>not</emphasis>."
msgstr ""
"If the application needs to update data, a <literal>read-write</literal> "
"cache might be appropriate. This cache strategy should never be used if "
"serializable transaction isolation level is required. If the cache is used "
"in a JTA environment, you must specify the property <literal>hibernate."
"transaction.manager_lookup_class</literal>, naming a strategy for obtaining "
"the JTA <literal>TransactionManager</literal>. In other environments, you "
"should ensure that the transaction is completed when <literal>Session.close()"
"</literal> or <literal>Session.disconnect()</literal> is called. If you wish "
"to use this strategy in a cluster, you should ensure that the underlying "
"cache implementation supports locking. The built-in cache providers do "
"<emphasis>not</emphasis>."

#. Tag: programlisting
#: performance.xml:730
#, no-c-format
msgid ""
"<![CDATA[<class name=\"eg.Cat\" .... >\n"
"    <cache usage=\"read-write\"/>\n"
"    ....\n"
"    <set name=\"kittens\" ... >\n"
"        <cache usage=\"read-write\"/>\n"
"        ....\n"
"    </set>\n"
"</class>]]>"
msgstr ""

#. Tag: title
#: performance.xml:735
#, no-c-format
msgid "Strategy: nonstrict read/write"
msgstr "Strategy: nonstrict read/write"

#. Tag: para
#: performance.xml:737
#, no-c-format
msgid ""
"If the application only occasionally needs to update data (ie. if it is "
"extremely unlikely that two transactions would try to update the same item "
"simultaneously) and strict transaction isolation is not required, a "
"<literal>nonstrict-read-write</literal> cache might be appropriate. If the "
"cache is used in a JTA environment, you must specify <literal>hibernate."
"transaction.manager_lookup_class</literal>. In other environments, you "
"should ensure that the transaction is completed when <literal>Session.close()"
"</literal> or <literal>Session.disconnect()</literal> is called."
msgstr ""
"If the application only occasionally needs to update data (ie. if it is "
"extremely unlikely that two transactions would try to update the same item "
"simultaneously) and strict transaction isolation is not required, a "
"<literal>nonstrict-read-write</literal> cache might be appropriate. If the "
"cache is used in a JTA environment, you must specify <literal>hibernate."
"transaction.manager_lookup_class</literal>. In other environments, you "
"should ensure that the transaction is completed when <literal>Session.close()"
"</literal> or <literal>Session.disconnect()</literal> is called."

#. Tag: title
#: performance.xml:749
#, no-c-format
msgid "Strategy: transactional"
msgstr "Strategy: transactional"

#. Tag: para
#: performance.xml:751
#, no-c-format
msgid ""
"The <literal>transactional</literal> cache strategy provides support for "
"fully transactional cache providers such as JBoss TreeCache. Such a cache "
"may only be used in a JTA environment and you must specify "
"<literal>hibernate.transaction.manager_lookup_class</literal>."
msgstr ""
"The <literal>transactional</literal> cache strategy provides support for "
"fully transactional cache providers such as JBoss TreeCache. Such a cache "
"may only be used in a JTA environment and you must specify "
"<literal>hibernate.transaction.manager_lookup_class</literal>."

#. Tag: para
#: performance.xml:759
#, no-c-format
msgid ""
"None of the cache providers support all of the cache concurrency strategies. "
"The following table shows which providers are compatible with which "
"concurrency strategies."
msgstr ""
"None of the cache providers support all of the cache concurrency strategies. "
"The following table shows which providers are compatible with which "
"concurrency strategies."

#. Tag: title
#: performance.xml:765
#, no-c-format
msgid "Cache Concurrency Strategy Support"
msgstr "Cache Concurrency Strategy Support"

#. Tag: entry
#: performance.xml:775
#, no-c-format
msgid "read-only"
msgstr "read-only"

#. Tag: entry
#: performance.xml:776
#, no-c-format
msgid "nonstrict-read-write"
msgstr "nonstrict-read-write"

#. Tag: entry
#: performance.xml:777
#, no-c-format
msgid "read-write"
msgstr "read-write"

#. Tag: entry
#: performance.xml:778
#, no-c-format
msgid "transactional"
msgstr "transactional"

#. Tag: title
#: performance.xml:824
#, no-c-format
msgid "Managing the caches"
msgstr "Managing the caches"

#. Tag: para
#: performance.xml:826
#, no-c-format
msgid ""
"Whenever you pass an object to <literal>save()</literal>, <literal>update()</"
"literal> or <literal>saveOrUpdate()</literal> and whenever you retrieve an "
"object using <literal>load()</literal>, <literal>get()</literal>, "
"<literal>list()</literal>, <literal>iterate()</literal> or <literal>scroll()"
"</literal>, that object is added to the internal cache of the "
"<literal>Session</literal>."
msgstr ""
"Whenever you pass an object to <literal>save()</literal>, <literal>update()</"
"literal> or <literal>saveOrUpdate()</literal> and whenever you retrieve an "
"object using <literal>load()</literal>, <literal>get()</literal>, "
"<literal>list()</literal>, <literal>iterate()</literal> or <literal>scroll()"
"</literal>, that object is added to the internal cache of the "
"<literal>Session</literal>."

#. Tag: para
#: performance.xml:833
#, no-c-format
msgid ""
"When <literal>flush()</literal> is subsequently called, the state of that "
"object will be synchronized with the database. If you do not want this "
"synchronization to occur or if you are processing a huge number of objects "
"and need to manage memory efficiently, the <literal>evict()</literal> method "
"may be used to remove the object and its collections from the first-level "
"cache."
msgstr ""
"When <literal>flush()</literal> is subsequently called, the state of that "
"object will be synchronized with the database. If you do not want this "
"synchronization to occur or if you are processing a huge number of objects "
"and need to manage memory efficiently, the <literal>evict()</literal> method "
"may be used to remove the object and its collections from the first-level "
"cache."

#. Tag: programlisting
#: performance.xml:841
#, no-c-format
msgid ""
"<![CDATA[ScrollableResult cats = sess.createQuery(\"from Cat as cat\").scroll"
"(); //a huge result set\n"
"while ( cats.next() ) {\n"
"    Cat cat = (Cat) cats.get(0);\n"
"    doSomethingWithACat(cat);\n"
"    sess.evict(cat);\n"
"}]]>"
msgstr ""

#. Tag: para
#: performance.xml:843
#, no-c-format
msgid ""
"The <literal>Session</literal> also provides a <literal>contains()</literal> "
"method to determine if an instance belongs to the session cache."
msgstr ""
"The <literal>Session</literal> also provides a <literal>contains()</literal> "
"method to determine if an instance belongs to the session cache."

#. Tag: para
#: performance.xml:848
#, no-c-format
msgid ""
"To completely evict all objects from the session cache, call "
"<literal>Session.clear()</literal>"
msgstr ""
"To completely evict all objects from the session cache, call "
"<literal>Session.clear()</literal>"

#. Tag: para
#: performance.xml:852
#, no-c-format
msgid ""