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From ahgittin <>
Subject [GitHub] incubator-brooklyn pull request: Brooklyn node and cluster upgrade
Date Mon, 27 Oct 2014 17:03:07 GMT
Github user ahgittin commented on a diff in the pull request:
    --- Diff: software/base/src/main/java/brooklyn/entity/brooklynnode/
    @@ -0,0 +1,119 @@
    + * 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
    + *
    + *
    + *
    + * Unless required by applicable law or agreed to in writing,
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    + * KIND, either express or implied.  See the License for the
    + * specific language governing permissions and limitations
    + * under the License.
    + */
    +package brooklyn.entity.brooklynnode;
    +import java.util.Collection;
    +import java.util.concurrent.Callable;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +import brooklyn.enricher.Enrichers;
    +import brooklyn.entity.Entity;
    +import brooklyn.entity.basic.EntityFunctions;
    +import brooklyn.entity.basic.EntityPredicates;
    +import brooklyn.entity.basic.ServiceStateLogic;
    +import brooklyn.entity.basic.ServiceStateLogic.ServiceProblemsLogic;
    +import brooklyn.entity.brooklynnode.effector.BrooklynClusterUpgradeEffectorBody;
    +import brooklyn.entity.brooklynnode.effector.SelectMasterEffectorBody;
    +import brooklyn.event.feed.function.FunctionFeed;
    +import brooklyn.event.feed.function.FunctionPollConfig;
    +import brooklyn.util.time.Duration;
    +public class BrooklynClusterImpl extends DynamicClusterImpl implements BrooklynCluster
    +    private static final String MSG_NO_MASTER = "No master node in cluster";
    +    private static final String MSG_TOO_MANY_MASTERS = "Too many master nodes in cluster";
    +    private static final Logger LOG = LoggerFactory.getLogger(BrooklynClusterImpl.class);
    +    // TODO should we set a default MEMBER_SPEC ?  difficult though because we'd need
to set a password
    +    @SuppressWarnings("unused")
    +    private FunctionFeed scanMaster;
    +    @Override
    +    public void init() {
    +        super.init();
    +        getMutableEntityType().addEffector(SelectMasterEffectorBody.SELECT_MASTER);
    +        getMutableEntityType().addEffector(BrooklynClusterUpgradeEffectorBody.UPGRADE_CLUSTER);
    +        ServiceProblemsLogic.updateProblemsIndicator(this, MASTER_NODE, MSG_NO_MASTER);
    +        scanMaster = FunctionFeed.builder()
    --- End diff --
    i think you're right.  there is a feature enablement which controls whether `FunctionFeed.setEntity`
does the `addFeed` call but it defaults to false.  i think i vote in favour of the API adding
it explicitly, as is done for enrichers etc.  (but for true API parity we'd have `Spec` classes.)
    without this it will work the first time but will not get updated on rebind.

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