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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;
import org.apache.geode.internal.Assert;
import org.apache.geode.internal.i18n.LocalizedStrings;
/**
* Provides information about the aggregate health of the members of a GemFire distributed system
* ("components"). The {@link #getHealth getHealth} method provides an indication of the overall
* health. Health is expressed as one of three levels: {@link #GOOD_HEALTH GOOD_HEALTH},
* {@link #OKAY_HEALTH OKAY_HEALTH}, and {@link #POOR_HEALTH POOR_HEALTH}. The {@link #getDiagnosis
* getDiagnosis} method provides a more detailed explanation of the cause of ill health.
*
*
*
* The aggregate health of the GemFire component is evaluated
* {@linkplain GemFireHealthConfig#setHealthEvaluationInterval every so often} and if certain
* criteria are met, then the overall health of the component changes accordingly. If any of the
* components is in OKAY_HEALTH, then the overall health is OKAY_HEALTH.
* If any of the components is in POOR_HEALTH, then the overall health is
* POOR_HEALTH.
*
*
* @since GemFire 3.5
* @deprecated as of 7.0 use the management
* package instead
*/
public interface GemFireHealth {
/**
* An indicator that the GemFire components are healthy.
*
* @see #getHealth
*/
public static final Health GOOD_HEALTH = new Health(Health.GOOD_STRING);
/**
* An indicator that one or more GemFire components is slightly unhealthy. The problem may or may
* not require configuration changes and may not necessarily lead to poorer component health.
*
* @see #getHealth
*/
public static final Health OKAY_HEALTH = new Health(Health.OKAY_STRING);
/**
* An indicator that one or more GemFire components is unhealthy. While it may be possible for the
* components to recover on their own, it is likely that they will have to be restarted.
*
* @see #getHealth
*/
public static final Health POOR_HEALTH = new Health(Health.POOR_STRING);
/////////////////////// Instance Methods ///////////////////////
/**
* Returns an indicator of the overall health of the GemFire components.
*
* @see #GOOD_HEALTH
* @see #OKAY_HEALTH
* @see #POOR_HEALTH
*/
public Health getHealth();
/**
* Resets the overall health of the GemFire components to {@link #GOOD_HEALTH}. This operation
* should be invoked when the operator has determined that warnings about the components's health
* do not need to be regarded.
*/
public void resetHealth();
/**
* Returns a message that provides a description of the cause of a component's ill health.
*/
public String getDiagnosis();
/**
* Returns the configuration for determining the health of the distributed system itself.
*/
public DistributedSystemHealthConfig getDistributedSystemHealthConfig();
/**
* Sets the configuration for determining the health of the distributed system itself.
*/
public void setDistributedSystemHealthConfig(DistributedSystemHealthConfig config);
/**
* Returns the GemFireHealthConfig for GemFire components whose configurations are
* not overridden on a per-host basis. Note that changes made to the returned
* GemFireHealthConfig will not take effect until
* {@link #setDefaultGemFireHealthConfig} is invoked.
*/
public GemFireHealthConfig getDefaultGemFireHealthConfig();
/**
* Sets the GemFireHealthConfig for GemFire components whose configurations are not
* overridden on a per-host basis.
*
* @throws IllegalArgumentException If config specifies the config for a host
*/
public void setDefaultGemFireHealthConfig(GemFireHealthConfig config);
/**
* Returns the GemFireHealthConfig for GemFire components that reside on a given
* host. This configuration will override the {@linkplain #getDefaultGemFireHealthConfig default}
* configuration.
*
* @param hostName The {@linkplain java.net.InetAddress#getCanonicalHostName canonical} name of
* the host.
*/
public GemFireHealthConfig getGemFireHealthConfig(String hostName);
/**
* Sets the GemFireHealthConfig for GemFire components that reside on a given host.
* This configuration will override the {@linkplain #getDefaultGemFireHealthConfig default}
* configuration. Note that changes made to the returned GemFireHealthConfig will not
* take effect until {@link #setDefaultGemFireHealthConfig} is invoked.
*
* @param hostName The {@linkplain java.net.InetAddress#getCanonicalHostName canonical} name of
* the host.
*
* @throws IllegalArgumentException If host hostName does not exist or if there are
* no GemFire components running on that host or if config does not configure
* host hostName.
*/
public void setGemFireHealthConfig(String hostName, GemFireHealthConfig config);
/**
* Closes this health monitor and releases all resources associated with it.
*/
public void close();
/**
* Returns whether or not this GemFireHealth is {@linkplain #close closed}.
*/
public boolean isClosed();
////////////////////// Inner Classes //////////////////////
/**
* An enumerated type for the health of GemFire.
*/
public static class Health implements java.io.Serializable {
private static final long serialVersionUID = 3039539430412151801L;
/** The string for good health */
static final String GOOD_STRING = LocalizedStrings.GemFireHealth_GOOD.toLocalizedString();
/** The string for okay health */
static final String OKAY_STRING = LocalizedStrings.GemFireHealth_OKAY.toLocalizedString();
/** The string for poor health */
static final String POOR_STRING = LocalizedStrings.GemFireHealth_POOR.toLocalizedString();
//////////////////// Instance Fields ////////////////////
/** The string for this health */
private String healthString;
///////////////////// Constructors //////////////////////
/**
* Creates a new Health with the given string
*/
protected Health(String healthString) {
this.healthString = healthString;
}
//////////////////// Instance Methods ////////////////////
/**
* Returns the appropriate canonical instance of Health.
*/
public Object readResolve() {
if (this.healthString.equals(GOOD_STRING)) {
return GemFireHealth.GOOD_HEALTH;
} else if (this.healthString.equals(OKAY_STRING)) {
return GemFireHealth.OKAY_HEALTH;
} else if (this.healthString.equals(POOR_STRING)) {
return GemFireHealth.POOR_HEALTH;
} else {
Assert.assertTrue(false, "Unknown healthString: " + this.healthString);
return null;
}
}
@Override
public String toString() {
return this.healthString;
}
}
}