http://git-wip-us.apache.org/repos/asf/incubator-geode/blob/c0221bed/geode-core/src/main/java/org/apache/geode/admin/internal/AbstractHealthEvaluator.java
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-/*
- * 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 org.apache.geode.admin.internal;
-
-import java.util.List;
-
-import org.apache.logging.log4j.Logger;
-
-import org.apache.geode.admin.GemFireHealth;
-import org.apache.geode.admin.GemFireHealthConfig;
-import org.apache.geode.distributed.internal.DM;
-import org.apache.geode.internal.i18n.LocalizedStrings;
-import org.apache.geode.internal.logging.LogService;
-import org.apache.geode.internal.logging.log4j.LocalizedMessage;
-
-/**
- * The abstract superclass of all GemFire health evaluators.
- * Basically, this class specifies what the health evaluators need and
- * what they should do.
- *
- * <P>
- *
- * Note that evaluators never reside in the administration VM, they
- * only in member VMs.  They are not <code>Serializable</code> and
- * aren't meant to be.
- *
- *
- * @since GemFire 3.5
- * */
-public abstract class AbstractHealthEvaluator  {
-
-  private static final Logger logger = LogService.getLogger();
-  
-  /** The number of times this evaluator has been evaluated.  Certain
-   * checks are not made the first time an evaluation occurs.  */
-  private int numEvaluations;
-
-  //////////////////////  Constructors  //////////////////////
-
-  /**
-   * Creates a new <code>AbstractHealthEvaluator</code> with the given
-   * <code>GemFireHealthConfig</code> and
-   * <code>DistributionManager</code>.  
-   *
-   * Originally, this method took an
-   * <code>InternalDistributedSystem</code>, but we found there were
-   * race conditions during initialization.  Namely, that a
-   * <code>DistributionMessage</code> can be processed before the
-   * <code>InternalDistributedSystem</code>'s
-   * <code>DistributionManager</code> is set.
-   */
-  protected AbstractHealthEvaluator(GemFireHealthConfig config,
-                                    DM dm)
-  {
-    this.numEvaluations = 0;
-  }
-
-  /////////////////////  Instance Methods  /////////////////////
-
-  /**
-   * Evaluates the health of a component of a GemFire distributed
-   * system. 
-   *
-   * @param status
-   *        A list of {@link AbstractHealthEvaluator.HealthStatus
-   *        HealthStatus} objects that is populated when ill health is
-   *        detected.
-   */
-  public final void evaluate(List status) {
-    this.numEvaluations++;
-    check(status);
-  }
-
-  /**
-   * Checks the health of a component of a GemFire distributed
-   * system. 
-   *
-   * @see #evaluate
-   */
-  protected abstract void check(List status);
-
-  /**
-   * Returns whether or not this is the first evaluation
-   */
-  protected final boolean isFirstEvaluation() {
-    return this.numEvaluations <= 1;
-  }
-
-  /**
-   * A factory method that creates a {@link
-   * AbstractHealthEvaluator.HealthStatus HealthStats} with
-   * {@linkplain GemFireHealth#OKAY_HEALTH okay} status.
-   */
-  protected HealthStatus okayHealth(String diagnosis) {
-    
logger.info(LocalizedMessage.create(LocalizedStrings.AbstractHealthEvaluator_OKAY_HEALTH__0,
 diagnosis));
-    return new HealthStatus(GemFireHealth.OKAY_HEALTH, diagnosis);
-  }
-
-  /**
-   * A factory method that creates a {@link
-   * AbstractHealthEvaluator.HealthStatus HealthStats} with
-   * {@linkplain GemFireHealth#POOR_HEALTH poor} status.
-   */
-  protected HealthStatus poorHealth(String diagnosis) {
-    
logger.info(LocalizedMessage.create(LocalizedStrings.AbstractHealthEvaluator_POOR_HEALTH__0,
 diagnosis));
-    return new HealthStatus(GemFireHealth.POOR_HEALTH, diagnosis);
-  }
-
-  /**
-   * Returns a <code>String</code> describing the component whose
-   * health is evaluated by this evaluator.
-   */
-  protected abstract String getDescription();
-
-  /**
-   * Closes this evaluator and releases all of its resources
-   */
-  abstract void close();
-
-  ///////////////////////  Inner Classes  //////////////////////
-
-  /**
-   * Represents the health of a GemFire component.
-   */
-  public class HealthStatus  {
-    /** The health of a GemFire component */
-    private GemFireHealth.Health healthCode;
-
-    /** The diagnosis of the illness */
-    private String diagnosis;
-
-    //////////////////////  Constructors  //////////////////////
-
-    /**
-     * Creates a new <code>HealthStatus</code> with the give
-     * <code>health</code> code and <code>dianosis</code> message.
-     *
-     * @see GemFireHealth#OKAY_HEALTH
-     * @see GemFireHealth#POOR_HEALTH
-     */
-    HealthStatus(GemFireHealth.Health healthCode, String diagnosis) {
-      this.healthCode = healthCode;
-      this.diagnosis =
-        "[" + AbstractHealthEvaluator.this.getDescription() + "] " +
-        diagnosis;
-    }
-
-    /////////////////////  Instance Methods  /////////////////////
-
-    /**
-     * Returns the health code
-     *
-     * @see GemFireHealth#OKAY_HEALTH
-     * @see GemFireHealth#POOR_HEALTH
-     */
-    public GemFireHealth.Health getHealthCode() {
-      return this.healthCode;
-    }
-
-    /**
-     * Returns the diagnosis prepended with a description of the
-     * component that is ill.
-     */
-    public String getDiagnosis() {
-      return this.diagnosis;
-    }
-
-  }
-
-}

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