mcconnell 2002/12/11 16:34:07
Modified: merlin/src/java/org/apache/avalon/merlin/block
DefaultBlock.java
Log:
Addition of code to handle the creation of a root container within a block.
Revision Changes Path
1.6 +69 -1
avalon-sandbox/merlin/src/java/org/apache/avalon/merlin/block/DefaultBlock.java
Index: DefaultBlock.java
===================================================================
RCS file:
/home/cvs/avalon-sandbox/merlin/src/java/org/apache/avalon/merlin/block/DefaultBlock.java,v
retrieving revision 1.5
retrieving revision 1.6
diff -u -r1.5 -r1.6
--- DefaultBlock.java 11 Dec 2002 04:59:46 -0000 1.5
+++ DefaultBlock.java 12 Dec 2002 00:34:07 -0000 1.6
@@ -9,6 +9,8 @@
import java.util.jar.Attributes;
import java.util.jar.Manifest;
import java.util.jar.JarFile;
+import java.util.Map;
+import java.util.Hashtable;
import org.apache.avalon.framework.logger.AbstractLogEnabled;
import org.apache.avalon.assembly.appliance.DefaultAppliance;
@@ -21,6 +23,10 @@
import org.apache.avalon.framework.configuration.Configurable;
import org.apache.avalon.framework.configuration.ConfigurationException;
import org.apache.avalon.assembly.engine.model.ClasspathDescriptor;
+import org.apache.avalon.assembly.appliance.Appliance;
+import org.apache.avalon.merlin.container.DefaultContainer;
+import org.apache.avalon.meta.info.Type;
+import org.apache.avalon.meta.model.Profile;
public class DefaultBlock extends BlockLoader implements Block,
Contextualizable, Initializable
{
@@ -48,6 +54,8 @@
// state
//==============================================================
+ private String m_name;
+
private EngineClassLoader m_engine;
private Manifest m_manifest;
@@ -61,6 +69,11 @@
*/
private Configuration m_config;
+ /**
+ * The applaince holding the root container.
+ */
+ private Appliance m_appliance;
+
//==============================================================
// Contextualizable
//==============================================================
@@ -87,6 +100,57 @@
{
getLogger().debug( "initialization" );
m_config = getBlockConfiguration( getJarFile( m_url ) );
+
+ String name = getName();
+ m_appliance = createContainmentAppliance( m_config );
+ m_appliance.access();
+
+ try
+ {
+ ClasspathDescriptor path =
+ CREATOR.createClasspathDescriptor( m_config.getChild( "blocks"
) );
+ URL[] urls = ClasspathDescriptor.expand( m_home, path );
+ Block[] blocks = install( m_engine, m_home, urls );
+ }
+ catch( Throwable e )
+ {
+ final String error =
+ "Subsidiary block deployment failure in parent block: " + name;
+ throw new BlockException( error, e );
+ }
+ }
+
+ public Appliance createContainmentAppliance( Configuration config )
throws Exception
+ {
+ String name = getName();
+ Configuration containment = m_config.getChild( "container" );
+ String classname = containment.getAttribute( "type",
DefaultContainer.class.getName() );
+ Type type = m_engine.getRepository().getTypeManager().getType(
classname );
+ Profile profile =
m_engine.getRepository().getProfileManager().getProfile( type );
+
+ try
+ {
+ Map map = new Hashtable();
+ map.put( "urn:assembly:engine.classloader", m_engine );
+ Appliance appliance = m_engine.createAppliance( profile, map,
false );
+ m_engine.assemble( appliance );
+ return appliance;
+ }
+ catch( Throwable e )
+ {
+ final String error =
+ "Root container establishment error in block: " + name;
+ throw new BlockException( error, e );
+ }
+ }
+
+ //==============================================================
+ // Block
+ //==============================================================
+
+ public void assemble() throws Exception
+ {
+ getLogger().debug( "assemble" );
ClasspathDescriptor path =
CREATOR.createClasspathDescriptor( m_config.getChild( "blocks" ) );
URL[] urls = ClasspathDescriptor.expand( m_home, path );
@@ -99,6 +163,10 @@
public String getName()
{
- return getName( m_manifest );
+ if( m_name == null )
+ {
+ m_name = getName( m_manifest );
+ }
+ return m_name;
}
}
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