Github user aledsage commented on a diff in the pull request:
https://github.com/apache/incubator-brooklyn/pull/587#discussion_r28207771
--- Diff:
usage/camp/src/main/java/io/brooklyn/camp/brooklyn/spi/creation/service/ServiceTypeResolver.java
---
@@ -0,0 +1,73 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package io.brooklyn.camp.brooklyn.spi.creation.service;
+
+import java.util.ServiceLoader;
+
+import
io.brooklyn.camp.brooklyn.spi.creation.BrooklynComponentTemplateResolver;
+import brooklyn.catalog.CatalogItem;
+import brooklyn.entity.Entity;
+import brooklyn.entity.proxying.EntitySpec;
+
+/**
+ * Resolves and decorates {@link EntitySpec entity specifications} based
on the {@code serviceType} in a template.
+ * <p>
+ * The {@link #getTypePrefix()} method returns a string that should match
the beginning of the
+ * service type. The resolver implementation will use the rest of the
service type information
+ * to create and decorate an approprate {@link EntitySpec entity}.
+ * <p>
+ * The resolvers are loaded using the {@link ServiceLoader} mechanism,
allowing external libraries
+ * to add extra service type implementations that will be picked up at
runtime.
+ *
+ * @see BrooklynServiceTypeResolver
+ * @see ChefServiceTypeResolver
+ */
+public interface ServiceTypeResolver {
+
+ String DEFAULT_TYPE_PREFIX = "brooklyn";
+
+ /**
+ * The service type prefix the resolver is responsible for.
+ */
+ String getTypePrefix();
--- End diff --
I wonder about also having an `accepts(String serviceType)` or an
`accepts(BrooklynComponentTemplateResolver resolver, String serviceType)` -
i.e. similar to `LocationResolver` - but no strong feelings.
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