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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 flex.messaging.config;
/**
* This configuration class is derived from optional properties that
* may be supplied in the <properties> section of a destination.
* It exists to capture properties related to message throttling in a way
* that simplifies the ThrottleManager's usage of the configuration.
*/
public class ThrottleSettings
{
/**
* The Policy enum.
*/
public enum Policy
{
NONE,
ERROR,
IGNORE,
BUFFER,
CONFLATE
};
public static final String ELEMENT_INBOUND = "throttle-inbound";
public static final String ELEMENT_OUTBOUND = "throttle-outbound";
public static final String ELEMENT_POLICY = "policy";
public static final String ELEMENT_DEST_FREQ = "max-frequency";
public static final String ELEMENT_CLIENT_FREQ = "max-client-frequency";
// Errors
private static final int ERR_MSG_INVALID_INBOUND_POLICY = 11130;
private static final int ERR_MSG_INVALID_INCOMING_CLENT_FREQ = 11131;
private static final int ERR_MSG_INVALID_INCOMING_DEST_FREQ = 11132;
private static final int ERR_MSG_INVALID_OUTGOING_CLIENT_FREQ = 11133;
private static final int ERR_MSG_INVALID_OUTGOING_DEST_FREQ = 11134;
private static final int ERR_MSG_INVALID_NEGATIVE_VALUE = 11135;
private String destinationName;
private int inClientMessagesPerSec;
private int inDestinationMessagesPerSec;
private int outClientMessagesPerSec;
private int outDestinationMessagesPerSec;
private Policy inPolicy;
private Policy outPolicy;
/**
* Creates a ThrottleSettings instance with default settings.
*/
public ThrottleSettings()
{
inPolicy = Policy.NONE;
outPolicy = Policy.NONE;
}
/**
* Parses the throttle policy out of the given string.
*
* @param policy The string policy to parse.
* @return The Policy.
*/
public static Policy parsePolicy(String policy)
{
if (Policy.NONE.toString().equalsIgnoreCase(policy))
return Policy.NONE;
else if (Policy.IGNORE.toString().equalsIgnoreCase(policy))
return Policy.IGNORE;
else if (Policy.ERROR.toString().equalsIgnoreCase(policy))
return Policy.ERROR;
else if (Policy.BUFFER.toString().equalsIgnoreCase(policy))
return Policy.BUFFER;
else if (Policy.CONFLATE.toString().equalsIgnoreCase(policy))
return Policy.CONFLATE;
ConfigurationException ex = new ConfigurationException();
// Message will be set by the caller.
throw ex;
}
/**
* Returns true if inbound or outbound client throttling is enabled.
*
* @return True if the incoming client frequency or outgoing
* client frequency is enabled; otherwise false.
*/
public boolean isClientThrottleEnabled()
{
return isInboundClientThrottleEnabled() || isOutboundClientThrottleEnabled();
}
/**
* Returns true if inbound client throttling is enabled.
*
* @return True if the inbound client throttling is enabled.
*/
public boolean isInboundClientThrottleEnabled()
{
return inPolicy != Policy.NONE && getIncomingClientFrequency() > 0;
}
/**
* Returns true if outbound client throttling is enabled.
*
* @return True if the outbound client throttling is enabled.
*/
public boolean isOutboundClientThrottleEnabled()
{
return outPolicy != Policy.NONE && getOutgoingClientFrequency() > 0;
}
/**
* Returns true if inbound or outbound destination throttling is enabled.
*
* @return true if incoming or outbound destination throttling is enabled;
* otherwise false.
*/
public boolean isDestinationThrottleEnabled()
{
return isInboundDestinationThrottleEnabled() || isOutboundDestinationThrottleEnabled();
}
/**
* Returns true if inbound destination throttling is enabled.
*
* @return true if inbound destination throttling is enabled.
*/
public boolean isInboundDestinationThrottleEnabled()
{
return inPolicy != Policy.NONE && getIncomingDestinationFrequency() > 0;
}
/**
* Returns true if outbound destination throttling is enabled.
*
* @return true if outbound destination throttling is enabled.
*/
public boolean isOutboundDestinationThrottleEnabled()
{
return outPolicy != Policy.NONE && getOutgoingDestinationFrequency() > 0;
}
/**
* Returns the inbound throttle policy.
*
* @return the inbound throttle policy.
*/
public Policy getInboundPolicy()
{
return inPolicy;
}
/**
* Sets inbound throttle policy. The inbound policy may be NONE, ERROR, or IGNORE.
*
* @param inPolicy The inbound policy.
*/
public void setInboundPolicy(Policy inPolicy)
{
if (inPolicy != Policy.NONE && inPolicy != Policy.ERROR && inPolicy != Policy.IGNORE)
{
ConfigurationException ex = new ConfigurationException();
// Invalid inbound throttle policy ''{0}'' for destination ''{1}''. Valid values are 'NONE', 'ERROR', and 'IGNORE'.
ex.setMessage(ERR_MSG_INVALID_INBOUND_POLICY, new Object[]{inPolicy, destinationName});
throw ex;
}
this.inPolicy = inPolicy;
}
/**
* Returns the outbound throttle policy.
*
* @return the outbound throttle policy.
*/
public Policy getOutboundPolicy()
{
return outPolicy;
}
/**
* Sets the outbound throttle policy. The outbound policy can be NONE, IGNORE,
* BUFFER, or CONFLATE.
*
* @param outPolicy The outbound policy.
*/
public void setOutboundPolicy(Policy outPolicy)
{
// Policy is checked at throttle manager.
this.outPolicy = outPolicy;
}
/**
* Returns the destination name for ThrottleSettings.
*
* @return the destination name for ThrottleSettings.
*/
public String getDestinationName()
{
return destinationName;
}
/**
* Sets the destination name for ThrottleSettings. This is set
* automatically when NetworkSettings is assigned to a destination.
*
* @param destinationName The destination name.
*/
public void setDestinationName(String destinationName)
{
this.destinationName = destinationName;
}
/**
* Returns the incoming client frequency (max-client-frequency).
*
* @return The incoming client frequency (max-client-frequency).
*/
public int getIncomingClientFrequency()
{
return inClientMessagesPerSec;
}
/**
* Sets the incoming client frequency (max-client-frequency). Optional and the
* default value is 0. Note that the incoming client frequency cannot be more
* than the incoming destination frequency.
*
* @param n The incoming client frequency.
*/
public void setIncomingClientFrequency(int n)
{
String name = "incoming client frequency";
blockNegative(n, name);
if (inDestinationMessagesPerSec > 0 && n > inDestinationMessagesPerSec)
{
ConfigurationException ex = new ConfigurationException();
// Invalid {0} for destination ''{1}''. {0} ''{2}'' cannot be more than the incoming destination frequency ''{3}''.
ex.setMessage(ERR_MSG_INVALID_INCOMING_CLENT_FREQ, new Object[]{name, destinationName,
Integer.valueOf(n), Integer.valueOf(inDestinationMessagesPerSec)});
throw ex;
}
this.inClientMessagesPerSec = n;
}
/**
* Returns the incoming destination frequency (max-frequency).
*
* @return The incoming destination frequency (max-frequency).
*/
public int getIncomingDestinationFrequency()
{
return inDestinationMessagesPerSec;
}
/**
* Sets the incoming destination frequency (max-frequency). Optional and the
* default value is 0. Note that the incoming destination frequency cannot be
* less than the incoming client frequency.
*
* @param n The incoming destination frequency.
*/
public void setIncomingDestinationFrequency(int n)
{
String name = "The incoming destination frequency";
blockNegative(n, name);
if (inClientMessagesPerSec > 0 && n < inClientMessagesPerSec)
{
ConfigurationException ex = new ConfigurationException();
// Invalid {0} for destination ''{1}''. {0} ''{2}'' cannot be less than the incoming client frequency ''{3}''.
ex.setMessage(ERR_MSG_INVALID_INCOMING_DEST_FREQ, new Object[]{name, destinationName,
Integer.valueOf(n), Integer.valueOf(inClientMessagesPerSec)});
throw ex;
}
this.inDestinationMessagesPerSec = n;
}
/**
* Returns the outgoing client frequency (max-client-frequency).
*
* @return The outgoing client frequency (max-client-frequency).
*/
public int getOutgoingClientFrequency()
{
return outClientMessagesPerSec;
}
/**
* Sets the outgoing client frequency (max-client-frequency). Optional and the
* default value is 0. Note that the outgoing client frequency cannot be
* more than the outgoing destination frequency.
*
* @param n The outgoing client frequency.
*/
public void setOutgoingClientFrequency(int n)
{
String name = "The outgoing client frequency";
blockNegative(n, name);
if (outDestinationMessagesPerSec > 0 && n > outDestinationMessagesPerSec)
{
ConfigurationException ex = new ConfigurationException();
// Invalid {0} for destination ''{1}''. {0} ''{2}'' cannot be more than the outgoing destination frequency ''{3}''.
ex.setMessage(ERR_MSG_INVALID_OUTGOING_CLIENT_FREQ, new Object[]{name, destinationName,
Integer.valueOf(n), Integer.valueOf(outDestinationMessagesPerSec)});
throw ex;
}
this.outClientMessagesPerSec = n;
}
/**
* Returns the outgoing destination frequency (max-frequency).
*
* @return The outgoing destination frequency (max-frequency).
*/
public int getOutgoingDestinationFrequency()
{
return outDestinationMessagesPerSec;
}
/**
* Sets the outgoing destination frequency (max-frequency). Optional and the
* default value is 0. Note that the outgoing destination frequency cannot
* be less than the outgoing client frequency.
*
* @param n The outgoing destination frequency.
*/
public void setOutgoingDestinationFrequency(int n)
{
String name = "The outgoing destination frequency";
blockNegative(n, name);
if (outClientMessagesPerSec > 0 && n < outClientMessagesPerSec)
{
ConfigurationException ex = new ConfigurationException();
// Invalid {0} for destination ''{1}''. {0} ''{2}'' cannot be less than the outgoing client frequency ''{3}''.
ex.setMessage(ERR_MSG_INVALID_OUTGOING_DEST_FREQ, new Object[]{name, destinationName, Integer.valueOf(n),
Integer.valueOf(outClientMessagesPerSec)});
throw ex;
}
this.outDestinationMessagesPerSec = n;
}
protected void blockNegative(int n, String name)
{
if (n < 0)
{
ConfigurationException ex = new ConfigurationException();
// Invalid {0} for destination ''{1}''. {0} cannot be negative.
ex.setMessage(ERR_MSG_INVALID_NEGATIVE_VALUE, new Object[]{name, destinationName});
throw ex;
}
}
}
