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Cassandra Connection Pool: a flexible, robust connection pool for Apache Cassandra
/**
* Copyright 2010 Tristan Tarrant
*
* Licensed 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 net.dataforte.cassandra.pool;
import java.beans.BeanInfo;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.lang.reflect.Method;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Properties;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* @author Tristan Tarrant
*/
public class PoolProperties implements PoolConfiguration {
static final Logger log = LoggerFactory.getLogger(PoolProperties.class);
static final Pattern URL_PATTERN = Pattern.compile("cassandra:thrift://([\\S&&[^:]]+)(:(\\d{1,5}))?");
static final int DEFAULT_THRIFT_PORT = 9160;
protected static AtomicInteger poolCounter = new AtomicInteger(0);
protected String url;
protected String host;
protected String[] configuredHosts;
protected int port = DEFAULT_THRIFT_PORT;
protected boolean framed = true;
protected boolean automaticHostDiscovery = false;
protected HostFailoverPolicy failoverPolicy = HostFailoverPolicy.ON_FAIL_TRY_ALL_AVAILABLE;
protected int socketTimeout = 5000;
protected int initialSize = 10;
protected int maxActive = 100;
protected int maxIdle = maxActive;
protected int minIdle = initialSize;
protected int maxWait = 30000;
protected boolean testOnBorrow = false;
protected boolean testOnReturn = false;
protected boolean testWhileIdle = false;
protected int timeBetweenEvictionRunsMillis = 5000;
protected int numTestsPerEvictionRun;
protected int minEvictableIdleTimeMillis = 60000;
protected final boolean accessToUnderlyingConnectionAllowed = true;
protected boolean removeAbandoned = false;
protected int removeAbandonedTimeout = 60;
protected boolean logAbandoned = false;
protected String name = "Cassandra Connection Pool[" + (poolCounter.incrementAndGet()) + "-" + System.identityHashCode(PoolProperties.class) + "]";
protected String keySpace;
protected String password;
protected String username;
protected long validationInterval = 30000;
protected long hostRetryInterval = 300000;
protected boolean jmxEnabled = true;
protected boolean testOnConnect = false;
protected boolean fairQueue = true;
protected boolean useEquals = true;
protected int abandonWhenPercentageFull = 0;
protected long maxAge = 0;
protected boolean useLock = false;
protected int suspectTimeout = 0;
private String dataSourceJNDI;
private Object dataSource;
static private Map propertyDescriptors;
static {
propertyDescriptors = new HashMap();
try {
BeanInfo beanInfo = Introspector.getBeanInfo(PoolProperties.class);
for (PropertyDescriptor pd : beanInfo.getPropertyDescriptors()) {
propertyDescriptors.put(pd.getName(), pd);
}
propertyDescriptors = Collections.unmodifiableMap(propertyDescriptors);
} catch (IntrospectionException e) {
throw new RuntimeException("Could not introspect PoolProperties", e);
}
}
public static Collection getPropertyNames() {
return propertyDescriptors.keySet();
}
public PoolProperties() {
}
public void set(String name, Object value) {
PropertyDescriptor pd = propertyDescriptors.get(name);
if (pd == null) {
log.warn("Unknown property: " + name);
return;
}
Method setter = pd.getWriteMethod();
if (setter == null) {
log.warn("No write method for: " + name);
return;
}
try {
Class type = setter.getParameterTypes()[0];
// if the incoming value is a string and the setter is for something different from a string, attempt some conversions
if(value!=null && value instanceof String && type!=String.class) {
String svalue = ((String)value).trim();
if(int.class==type) {
setter.invoke(this, new Object[] { Integer.parseInt(svalue) } );
return;
} else if(long.class==type) {
setter.invoke(this, new Object[] { Long.parseLong(svalue) } );
return;
} else if(boolean.class==type) {
setter.invoke(this, new Object[] { Boolean.parseBoolean(svalue) } );
return;
} else if(type.isEnum()) {
Class unsafeType = type;
setter.invoke(this, new Object[] { Enum.valueOf(unsafeType, svalue) } );
return;
}
}
setter.invoke(this, new Object[] { value } );
} catch (Exception e) {
log.warn("Error setting property: "+name,e);
}
}
public Object get(String name) {
PropertyDescriptor pd = propertyDescriptors.get(name);
if (pd == null) {
throw new RuntimeException("Unknown property: " + name);
}
Method getter = pd.getReadMethod();
if (getter == null) {
throw new RuntimeException("No read method for: " + name);
}
try {
return getter.invoke(this, new Object[] {});
} catch (Exception e) {
throw new RuntimeException(e);
}
}
/**
* {@inheritDoc}
*/
@Override
public void setAbandonWhenPercentageFull(int percentage) {
if (percentage < 0)
abandonWhenPercentageFull = 0;
else if (percentage > 100)
abandonWhenPercentageFull = 100;
else
abandonWhenPercentageFull = percentage;
}
/**
* {@inheritDoc}
*/
@Override
public int getAbandonWhenPercentageFull() {
return abandonWhenPercentageFull;
}
/**
* {@inheritDoc}
*/
@Override
public boolean isFairQueue() {
return fairQueue;
}
/**
* {@inheritDoc}
*/
@Override
public void setFairQueue(boolean fairQueue) {
this.fairQueue = fairQueue;
}
@Override
public boolean isAutomaticHostDiscovery() {
return automaticHostDiscovery;
}
public void setAutomaticHostDiscovery(boolean automaticHostDiscovery) {
this.automaticHostDiscovery = automaticHostDiscovery;
}
/**
* {@inheritDoc}
*/
@Override
public int getInitialSize() {
return initialSize;
}
/**
* {@inheritDoc}
*/
@Override
public boolean isLogAbandoned() {
return logAbandoned;
}
/**
* {@inheritDoc}
*/
@Override
public int getMaxActive() {
return maxActive;
}
/**
* {@inheritDoc}
*/
@Override
public int getMaxIdle() {
return maxIdle;
}
/**
* {@inheritDoc}
*/
@Override
public int getMaxWait() {
return maxWait;
}
/**
* {@inheritDoc}
*/
@Override
public int getMinEvictableIdleTimeMillis() {
return minEvictableIdleTimeMillis;
}
/**
* {@inheritDoc}
*/
@Override
public int getMinIdle() {
return minIdle;
}
/**
* {@inheritDoc}
*/
@Override
public String getName() {
return name;
}
/**
* {@inheritDoc}
*/
@Override
public int getNumTestsPerEvictionRun() {
return numTestsPerEvictionRun;
}
/**
* {@inheritDoc}
*/
@Override
public String getPassword() {
return password;
}
/**
* {@inheritDoc}
*/
@Override
public String getPoolName() {
return getName();
}
/**
* {@inheritDoc}
*/
@Override
public boolean isRemoveAbandoned() {
return removeAbandoned;
}
/**
* {@inheritDoc}
*/
@Override
public int getRemoveAbandonedTimeout() {
return removeAbandonedTimeout;
}
/**
* {@inheritDoc}
*/
@Override
public boolean isTestOnBorrow() {
return testOnBorrow;
}
/**
* {@inheritDoc}
*/
@Override
public boolean isTestOnReturn() {
return testOnReturn;
}
/**
* {@inheritDoc}
*/
@Override
public boolean isTestWhileIdle() {
return testWhileIdle;
}
/**
* {@inheritDoc}
*/
@Override
public int getTimeBetweenEvictionRunsMillis() {
return timeBetweenEvictionRunsMillis;
}
/**
* {@inheritDoc}
*/
@Override
public String getUsername() {
return username;
}
/**
* {@inheritDoc}
*/
@Override
public long getValidationInterval() {
return validationInterval;
}
@Override
public long getHostRetryInterval() {
// TODO Auto-generated method stub
return 0;
}
/**
* {@inheritDoc}
*/
@Override
public boolean isTestOnConnect() {
return testOnConnect;
}
/**
* {@inheritDoc}
*/
@Override
public void setInitialSize(int initialSize) {
this.initialSize = initialSize;
}
/**
* {@inheritDoc}
*/
@Override
public void setLogAbandoned(boolean logAbandoned) {
this.logAbandoned = logAbandoned;
}
/**
* {@inheritDoc}
*/
@Override
public void setMaxActive(int maxActive) {
this.maxActive = maxActive;
}
/**
* {@inheritDoc}
*/
@Override
public void setMaxIdle(int maxIdle) {
this.maxIdle = maxIdle;
}
/**
* {@inheritDoc}
*/
@Override
public void setMaxWait(int maxWait) {
this.maxWait = maxWait;
}
/**
* {@inheritDoc}
*/
@Override
public void setMinEvictableIdleTimeMillis(int minEvictableIdleTimeMillis) {
this.minEvictableIdleTimeMillis = minEvictableIdleTimeMillis;
}
/**
* {@inheritDoc}
*/
@Override
public void setMinIdle(int minIdle) {
this.minIdle = minIdle;
}
/**
* {@inheritDoc}
*/
@Override
public void setName(String name) {
this.name = name;
}
/**
* {@inheritDoc}
*/
@Override
public void setNumTestsPerEvictionRun(int numTestsPerEvictionRun) {
this.numTestsPerEvictionRun = numTestsPerEvictionRun;
}
/**
* {@inheritDoc}
*/
@Override
public void setPassword(String password) {
this.password = password;
}
/**
* {@inheritDoc}
*/
@Override
public void setRemoveAbandoned(boolean removeAbandoned) {
this.removeAbandoned = removeAbandoned;
}
/**
* {@inheritDoc}
*/
@Override
public void setRemoveAbandonedTimeout(int removeAbandonedTimeout) {
this.removeAbandonedTimeout = removeAbandonedTimeout;
}
/**
* {@inheritDoc}
*/
@Override
public void setTestOnBorrow(boolean testOnBorrow) {
this.testOnBorrow = testOnBorrow;
}
/**
* {@inheritDoc}
*/
@Override
public void setTestWhileIdle(boolean testWhileIdle) {
this.testWhileIdle = testWhileIdle;
}
/**
* {@inheritDoc}
*/
@Override
public void setTestOnReturn(boolean testOnReturn) {
this.testOnReturn = testOnReturn;
}
/**
* {@inheritDoc}
*/
@Override
public void setTimeBetweenEvictionRunsMillis(int timeBetweenEvictionRunsMillis) {
this.timeBetweenEvictionRunsMillis = timeBetweenEvictionRunsMillis;
}
/**
* {@inheritDoc}
*/
@Override
public String getKeySpace() {
return keySpace;
}
/**
* {@inheritDoc}
*/
@Override
public void setKeySpace(String keySpace) {
this.keySpace = keySpace;
}
/**
* {@inheritDoc}
*/
@Override
public void setUsername(String username) {
this.username = username;
}
/**
* {@inheritDoc}
*/
@Override
public void setValidationInterval(long validationInterval) {
this.validationInterval = validationInterval;
}
/**
* {@inheritDoc}
*/
@Override
public void setTestOnConnect(boolean testOnConnect) {
this.testOnConnect = testOnConnect;
}
@Override
public String toString() {
StringBuilder buf = new StringBuilder("ConnectionPool[]");
return buf.toString();
}
public static int getPoolCounter() {
return poolCounter.get();
}
/**
* {@inheritDoc}
*/
@Override
public boolean isJmxEnabled() {
return jmxEnabled;
}
/**
* {@inheritDoc}
*/
@Override
public void setJmxEnabled(boolean jmxEnabled) {
this.jmxEnabled = jmxEnabled;
}
/**
* {@inheritDoc}
*/
@Override
public int getSuspectTimeout() {
return this.suspectTimeout;
}
/**
* {@inheritDoc}
*/
@Override
public void setSuspectTimeout(int seconds) {
this.suspectTimeout = seconds;
}
/**
* {@inheritDoc}
*/
@Override
public boolean isPoolSweeperEnabled() {
boolean timer = getTimeBetweenEvictionRunsMillis() > 0;
boolean result = timer && (isRemoveAbandoned() && getRemoveAbandonedTimeout() > 0);
result = result || (timer && getSuspectTimeout() > 0);
result = result || (timer && isTestWhileIdle());
result = result || (timer && getMinEvictableIdleTimeMillis() > 0);
result = result || (timer && isAutomaticHostDiscovery());
return result;
}
public static class InterceptorProperty {
String name;
String value;
public InterceptorProperty(String name, String value) {
assert (name != null);
this.name = name;
this.value = value;
}
public String getName() {
return name;
}
public String getValue() {
return value;
}
public boolean getValueAsBoolean(boolean def) {
if (value == null)
return def;
if ("true".equals(value))
return true;
if ("false".equals(value))
return false;
return def;
}
public int getValueAsInt(int def) {
if (value == null)
return def;
try {
int v = Integer.parseInt(value);
return v;
} catch (NumberFormatException nfe) {
return def;
}
}
public long getValueAsLong(long def) {
if (value == null)
return def;
try {
return Long.parseLong(value);
} catch (NumberFormatException nfe) {
return def;
}
}
public byte getValueAsByte(byte def) {
if (value == null)
return def;
try {
return Byte.parseByte(value);
} catch (NumberFormatException nfe) {
return def;
}
}
public short getValueAsShort(short def) {
if (value == null)
return def;
try {
return Short.parseShort(value);
} catch (NumberFormatException nfe) {
return def;
}
}
public float getValueAsFloat(float def) {
if (value == null)
return def;
try {
return Float.parseFloat(value);
} catch (NumberFormatException nfe) {
return def;
}
}
public double getValueAsDouble(double def) {
if (value == null)
return def;
try {
return Double.parseDouble(value);
} catch (NumberFormatException nfe) {
return def;
}
}
public char getValueAschar(char def) {
if (value == null)
return def;
try {
return value.charAt(0);
} catch (StringIndexOutOfBoundsException nfe) {
return def;
}
}
@Override
public int hashCode() {
return name.hashCode();
}
@Override
public boolean equals(Object o) {
if (o == this)
return true;
if (o instanceof InterceptorProperty) {
InterceptorProperty other = (InterceptorProperty) o;
return other.name.equals(this.name);
}
return false;
}
}
/**
* {@inheritDoc}
*/
@Override
public boolean isUseEquals() {
return useEquals;
}
/**
* {@inheritDoc}
*/
@Override
public void setUseEquals(boolean useEquals) {
this.useEquals = useEquals;
}
/**
* {@inheritDoc}
*/
@Override
public long getMaxAge() {
return maxAge;
}
/**
* {@inheritDoc}
*/
@Override
public void setMaxAge(long maxAge) {
this.maxAge = maxAge;
}
/**
* {@inheritDoc}
*/
@Override
public boolean getUseLock() {
return useLock;
}
/**
* {@inheritDoc}
*/
@Override
public void setUseLock(boolean useLock) {
this.useLock = useLock;
}
public static Map getProperties(String propText, Map props) {
if (props == null)
props = new HashMap();
if (propText != null) {
try {
Properties p = new Properties();
p.load(new ByteArrayInputStream(propText.replace(';', '\n').getBytes()));
props.clear();
for(Entry s : props.entrySet()) {
props.put(s.getKey(), s.getValue());
}
} catch (IOException x) {
throw new RuntimeException(x);
}
}
return props;
}
@Override
public void setHost(String host) {
this.host = host;
String[] hs = this.host.split(",");
configuredHosts = new String[hs.length];
for (int i = 0; i < hs.length; i++) {
configuredHosts[i] = hs[i].trim();
}
}
@Override
public String getHost() {
StringBuilder sb = new StringBuilder();
for (int i = 0; i < configuredHosts.length; i++) {
if (i > 0)
sb.append(",");
sb.append(configuredHosts[i]);
}
return sb.toString();
}
public String getUrl() {
return url;
}
public void setUrl(String url) {
Matcher matcher = URL_PATTERN.matcher(url);
if(matcher.matches()) {
this.url = url;
setHost(matcher.group(1));
String p = matcher.group(3);
setPort(p==null?DEFAULT_THRIFT_PORT:Integer.parseInt(p));
} else {
throw new IllegalArgumentException("The specified url '"+url+"' is not valid");
}
}
@Override
public void setPort(int port) {
this.port = port;
}
@Override
public int getPort() {
return port;
}
@Override
public void setFramed(boolean framed) {
this.framed = framed;
}
@Override
public boolean isFramed() {
return framed;
}
@Override
public int getSocketTimeout() {
return socketTimeout;
}
@Override
public void setSocketTimeout(int socketTimeout) {
this.socketTimeout = socketTimeout;
}
@Override
public String[] getConfiguredHosts() {
return configuredHosts;
}
@Override
public void setHostRetryInterval(long hostRetryInterval) {
this.hostRetryInterval = hostRetryInterval;
}
@Override
public void setFailoverPolicy(HostFailoverPolicy failoverPolicy) {
this.failoverPolicy = failoverPolicy;
}
@Override
public HostFailoverPolicy getFailoverPolicy() {
return failoverPolicy;
}
@Override
public void setDataSourceJNDI(String jndiDS) {
this.dataSourceJNDI = jndiDS;
}
@Override
public String getDataSourceJNDI() {
return this.dataSourceJNDI;
}
@Override
public void setDataSource(Object ds) {
this.dataSource = ds;
}
@Override
public Object getDataSource() {
return this.dataSource;
}
}
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