Fixes #140 (#146)

base/pom.xml

@@ -32,6 +32,10 @@
 				</exclusion>
 			</exclusions>
 		</dependency>
+		<dependency>
+			<groupId>com.structurizr</groupId>
+			<artifactId>structurizr-dsl</artifactId>
+		</dependency>
 		<dependency>
 			<groupId>com.structurizr</groupId>
 			<artifactId>structurizr-plantuml</artifactId>

base/src/main/java/org/ndx/agile/architecture/base/ArchitectureDocumentationBuilder.java

@@ -1,9 +1,12 @@
 package org.ndx.agile.architecture.base;
 
 import java.io.IOException;
+import java.util.logging.Level;
 import java.util.logging.Logger;
 
 import javax.enterprise.context.ApplicationScoped;
+import javax.enterprise.inject.Any;
+import javax.enterprise.inject.Instance;
 import javax.enterprise.inject.se.SeContainer;
 import javax.enterprise.inject.se.SeContainerInitializer;
 import javax.inject.Inject;
@@ -38,16 +41,29 @@ public static void main(String[] args) throws Throwable {
 
 	@Inject Logger logger;
 	@Inject @UsesComponent(description = "Adds information to initial architecture description") ArchitectureEnhancer enhancer;
-	@Inject @UsesComponent(description = "Generates initial architecture description") ArchitectureModelProvider provider;
+	@Inject @UsesComponent(description = "Generates initial architecture description") @Any Instance<ArchitectureModelProvider> availableProviders;
 
 	/**
 	 * Run method that will allow the description to be invoked and augmentations to be performed
 	 * prior to have elements written. You should not have to overwrite this method.
 	 * @throws IOException
 	 */
 	public void run() throws IOException {
-		Workspace workspace = provider.describeArchitecture();
+		Workspace workspace = getArchitecture();
 		logger.info("Architecture has been described. Now enhancing it (including writing the diagrams)!");
 		enhancer.enhance(workspace);
 	}
+
+	private Workspace getArchitecture() {
+		for(ArchitectureModelProvider provider : availableProviders) {
+			try {
+				return provider.describeArchitecture();
+			} catch(Throwable e) {
+				logger.log(Level.WARNING, 
+						String.format("model provider %s failed to load any workspace", provider.getClass().getName()), 
+						e);
+			}
+		}
+		throw new UnsupportedOperationException("There is no instance of ArchitectureModelProvider defined in project, and no workspace.dsl file to parse");
+	}
 }

base/src/main/java/org/ndx/agile/architecture/base/providers/FromDsl.java

@@ -0,0 +1,42 @@
+package org.ndx.agile.architecture.base.providers;
+
+import java.io.File;
+
+import javax.enterprise.inject.Alternative;
+import javax.inject.Inject;
+
+import org.apache.deltaspike.core.api.config.ConfigProperty;
+import org.ndx.agile.architecture.base.ArchitectureModelProvider;
+import org.ndx.agile.architecture.base.enhancers.ModelElementKeys;
+
+import com.structurizr.Workspace;
+import com.structurizr.dsl.StructurizrDslParser;
+import com.structurizr.dsl.StructurizrDslParserException;
+
+@Alternative
+public class FromDsl implements ArchitectureModelProvider {
+
+	private static final String WORKSPACE_DSL = ModelElementKeys.PREFIX + "dsl";
+	@Inject
+	@ConfigProperty(name = WORKSPACE_DSL, defaultValue = "src/architecture/resources/workspace.dsl") File workspace;
+
+	@Override
+	public Workspace describeArchitecture() {
+		if(!workspace.exists()) {
+			throw new UnsupportedOperationException(String.format(
+					"Parsing a workspace.dsl file supposes the file exists.\n"
+					+ "We tried to read file %s but there was nothing.\n"
+					+ "Please either move that file into that location or set the property %s",
+					workspace.getAbsolutePath(),
+					WORKSPACE_DSL));
+		}
+		StructurizrDslParser parser = new StructurizrDslParser();
+		try {
+			parser.parse(workspace);
+		} catch (StructurizrDslParserException e) {
+			throw new RuntimeException("Can't read workspace.dsl", e);
+		}
+		return parser.getWorkspace();
+	}
+
+}

pom.xml

@@ -97,6 +97,11 @@
 				<artifactId>deltaspike-core-impl</artifactId>
 				<version>1.9.5</version>
 			</dependency>
+			<dependency>
+				<groupId>com.structurizr</groupId>
+				<artifactId>structurizr-dsl</artifactId>
+				<version>1.18.0</version>
+			</dependency>
 			<dependency>
 				<groupId>com.structurizr</groupId>
 				<artifactId>structurizr-client</artifactId>