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8818e8daba
Purged the pointless FileContentFactory class. If everything else were working file reading and writing would now work. Various other cleanups and some richer internal documentation. git-svn-id: https://svn.alfresco.com/repos/alfresco-enterprise/alfresco/BRANCHES/WCM-DEV2/root@2904 c4b6b30b-aa2e-2d43-bbcb-ca4b014f7261
207 lines
9.6 KiB
XML
207 lines
9.6 KiB
XML
<?xml version="1.0" encoding="UTF-8"?>
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<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd" >
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<hibernate-mapping package="org.alfresco.repo.avm.hibernate">
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<!-- AVMNodeBean is the abstract base for filesystem like objects.
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We're using the one table per class hierarchy strategy to implement
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polymorphism. -->
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<class table="avm_nodes" lazy="true" abstract="true"
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name="AVMNodeBeanImpl"
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proxy="AVMNodeBean"
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optimistic-lock="version">
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<cache usage="read-write"/>
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<!-- The id is set programmatically using an Issuer. See below. -->
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<id name="id" column="id" type="long"/>
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<!-- I suppose this would be more efficient to encode type by an int.
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We'll see if using a string makes a difference. -->
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<discriminator column="class_type" type="string" length="20"/>
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<!-- We're using hibernate's own versioning scheme for concurrency control.
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I don't know how well that will play with a full Spring-JTA stack. -->
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<version column="vers" name="vers" type="long"/>
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<!-- BasicAttributes are attributes that pretty much all AVMNodes will
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have. -->
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<many-to-one name="basicAttributes" column="basic_attrs"
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class="BasicAttributesBeanImpl" unique="true" cascade="all"/>
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<many-to-one name="ancestor" column="ancestor_id"
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class="AVMNodeBeanImpl"/>
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<!-- Nothing does anything with this yet. We'll need it for
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complete versioning semantics. -->
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<many-to-one name="mergedFrom" column="merged_from"
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class="AVMNodeBeanImpl"/>
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<!-- Parent is a very specific notion of containment. The parent
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of an AVMNode is the parent in which that node was created. -->
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<many-to-one name="parent" column="parent_id"
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class="DirectoryNodeBeanImpl"/>
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<!-- This should really be not null, but I haven't figured out
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the right way to build the relation so that nullability constraints
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won't cause violations in the db during saves. -->
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<many-to-one name="repository" column="repository"
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class="RepositoryBeanImpl" cascade="save-update"/>
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<property name="versionID" type="long" column="version_id"
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not-null="true"/>
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<!-- The branch id is always 0 for nodes that are not part of
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a branch. -->
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<property name="branchID" type="long" column="branch_id"
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not-null="true"/>
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<!-- This is, in fact a duplication of data, but an extremely
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convenient one. -->
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<property name="isNew" column="is_new" type="boolean"
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not-null="true"/>
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<!-- Directories, two flavors. -->
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<subclass name="DirectoryNodeBeanImpl"
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proxy="DirectoryNodeBean"
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abstract="true">
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<!-- A Layered Directory is our smart symlink thingy. -->
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<subclass
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name="LayeredDirectoryNodeBeanImpl"
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proxy="LayeredDirectoryNodeBean" discriminator-value="layereddirectory">
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<!-- The layer id is an implementation trick to disambiguate
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exactly what layer is being refered to in various circumstances. -->
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<property name="layerID" column="layer_id" type="long" not-null="true"/>
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<!-- The is the moral equivalent of the value of a symlink. -->
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<property name="indirection" column="indirection" type="string"
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length="511"/>
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<!-- This marks a layered directory as either knowing itself what
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it points at (true) or inheriting what it points at from its
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container (false). -->
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<property name="primaryIndirection" column="primary_indirection" type="boolean"/>
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<!-- Map of names to DirectoryEntries. -->
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<map name="added" cascade="all">
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<key column="directory_id"/>
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<map-key type="string" column="name"/>
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<!-- A DirectoryEntry is a (node)type AVMNode reference pair.
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Should probably convert type into an integer code. -->
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<composite-element class="DirectoryEntry">
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<property name="type" column="type_name"
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type="string" length="30" not-null="true"/>
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<many-to-one name="child"
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class="AVMNodeBeanImpl"
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cascade="save-update" not-null="true">
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</many-to-one>
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</composite-element>
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</map>
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<!-- This is just the set of names of children deleted (and therefore
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hidden) in this layer. -->
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<set name="deleted" table="deleted_children"
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fetch="join" cascade="all">
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<key column="directory_id"/>
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<element type="string" column="name"/>
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</set>
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</subclass>
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<!-- Just plain directories. -->
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<subclass name="PlainDirectoryNodeBeanImpl"
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discriminator-value="plaindirectory" proxy="PlainDirectoryNodeBean">
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<!-- For reference count based garbage collection of purged nodes
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to work we need to specially mark the root directory of
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a Repository as special so that its absence of parents will
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not cause it to be vacuumed away. TODO: for ease of queries,
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this probably wants to be in the base class. -->
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<property name="isRoot" column="is_root" type="boolean"/>
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<!-- A map of names to DirectoryEntries. In the AVM world, it makes sense
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that nodes don't know there own names, only there containers do. -->
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<map name="children" cascade="all">
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<key column="directory_id"/>
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<map-key type="string" column="name"/>
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<composite-element class="org.alfresco.repo.avm.hibernate.DirectoryEntry">
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<property name="type" type="string" not-null="true" length="30"
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column="type_name"/>
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<many-to-one name="child"
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class="org.alfresco.repo.avm.hibernate.AVMNodeBeanImpl"
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not-null="true" cascade="save-update">
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</many-to-one>
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</composite-element>
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</map>
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</subclass>
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</subclass>
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<!-- There are two kinds of files, plain and symlinky. -->
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<subclass name="FileNodeBeanImpl"
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proxy="FileNodeBean"
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abstract="true">
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<!-- Plain files just have a reference to a Content object. -->
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<subclass discriminator-value="plainfile"
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name="PlainFileNodeBeanImpl"
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proxy="PlainFileNodeBean">
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<many-to-one name="content" column="content_id"
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class="ContentBeanImpl" fetch="join" cascade="save-update">
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</many-to-one>
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</subclass>
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<!-- Layered files are almost exactly copy on write symlinks. -->
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<subclass name="LayeredFileNodeBeanImpl"
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discriminator-value="layeredfile" proxy="LayeredFileNodeBean">
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<property name="indirection" type="string" length="511" column="indirection"/>
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</subclass>
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</subclass>
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</class>
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<!-- BasicAttributes are a glom of all the properties that (nearly) all filesystem like
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nodes have. -->
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<class name="BasicAttributesBeanImpl" proxy="BasicAttributesBean"
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lazy="true" optimistic-lock="version" table="basic_attributes">
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<id name="id" type="long">
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<generator class="native"></generator>
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</id>
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<version column="vers" name="vers" type="long"/>
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<property name="creator" type="string" not-null="true"/>
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<property name="owner" type="string" not-null="true"/>
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<property name="lastModifier" type="string" not-null="true"/>
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<property name="createDate" type="long" not-null="true"/>
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<property name="modDate" type="long" not-null="true"/>
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<property name="accessDate" type="long" not-null="true"/>
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</class>
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<!-- Contents are objects to hang actual bytestreams off. They are explicitly reference
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counted. -->
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<class table="contents" name="ContentBeanImpl" proxy="ContentBean"
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optimistic-lock="version">
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<cache usage="read-write" />
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<id name="id" column="id" type="long"/>
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<version name="vers" column="vers" type="long"/>
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<!-- The reference count. Contents are explicitly reference counted for now,
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however it make sense to fold this into a generalized garbage collection
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scheme. -->
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<property name="refCount" column="ref_count" type="int"
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not-null="true"/>
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</class>
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<!-- Issuers issue ids. They are explicit primary key generators. They seem more
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convenient than using 'native' generators, and may be more efficient. Come
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to think of it I'm not convinced that this is true. However I had a reason for
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doing things this way... -->
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<class name="Issuer" table="issuers" lazy="false"
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optimistic-lock="version">
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<cache usage="read-write" />
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<id name="name" column="name" type="string" length="20"/>
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<version name="vers" column="vers" type="long"/>
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<property name="next" column="next" type="long"
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not-null="true"/>
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</class>
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<!-- A Repository is the what we used to call a virtual repository.
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Each Repository has it's own branch ids and layer ids but shares node ids
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with other repositories. The physical repository is structured this way
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for better scaling. -->
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<class table="repositories" name="RepositoryBeanImpl"
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proxy="RepositoryBean" optimistic-lock="version">
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<cache usage="read-write" />
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<id name="name" column="name" type="string"/>
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<version name="vers" column="vers" type="long"/>
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<property type="long" name="nextVersionID"
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column="next_version_id" not-null="true"/>
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<!-- Every Repository has a root directory that is the current root directory. -->
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<!-- This should be not-null but hibernate (or my own idiocy) makes that difficult. -->
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<many-to-one name="root" class="DirectoryNodeBeanImpl"
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column="current_root_id" unique="true" cascade="save-update">
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</many-to-one>
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<!-- In addition to the current root directory, a Repository maintains a set
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of versioned root directories. -->
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<map name="roots" table="repository_roots">
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<key column="repository_id"/>
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<map-key type="long" column="version_id"/>
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<many-to-many class="DirectoryNodeBeanImpl"
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column="directory_id"/>
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</map>
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<!-- NewNodes keeps track of those nodes created since the last
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'snapshot' operation. -->
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<set table="new_nodes" name="newNodes" cascade="all">
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<key column="repository_id"/>
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<many-to-many class="AVMNodeBeanImpl"
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column="new_node_id"/>
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</set>
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</class>
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</hibernate-mapping>
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