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Apache Geode provides a database-like consistency model, reliable transaction processing and a shared-nothing architecture to maintain very low latency performance with high concurrency processing
/*
* 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.distributed.internal;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Properties;
import java.util.StringTokenizer;
import org.apache.geode.DataSerializer;
import org.apache.geode.internal.GemFireVersion;
/**
* Provides optional data fields as properties for StartupMessage and StartupResponseMessage. This
* is handled by serializing and deserializing a new Properties instance if and only if the member
* version is 6.6.3 or greater. New fields can be added to the Properties without breaking backwards
* compatibility. All new fields added should be written to allow for version compatibility.
*
* @since GemFire 7.0
*/
class StartupMessageData {
static final String HOSTED_LOCATORS = "HL";
static final String COMMA_DELIMITER = ",";
static final String MCAST_PORT = "MP";
static final String MCAST_HOST_ADDRESS = "MHA";
static final String IS_SHARED_CONFIG_ENABLED = "ISCE";
private Properties optionalFields;
/**
* Constructs a new instance with empty Properties. After construction the instance should
* optionally invoke one or more "write" methods such as {@link #writeHostedLocators(Collection)}
* before invoking toData(DataOutput) to marshal the Properties into the DataOutput
* (onto the wire).
*/
StartupMessageData() {
this.optionalFields = new Properties();
}
public void readFrom(DataInput in) throws ClassNotFoundException, IOException {
this.optionalFields = DataSerializer.readObject(in);
}
/**
* Check for the optional field {@link #HOSTED_LOCATORS} and return the value or null.
*/
Collection readHostedLocators() {
if (this.optionalFields == null || this.optionalFields.isEmpty()) {
return null;
}
Collection hostedLocators = null;
String hostedLocatorsString = this.optionalFields.getProperty(HOSTED_LOCATORS);
if (hostedLocatorsString != null && !hostedLocatorsString.isEmpty()) {
StringTokenizer st = new StringTokenizer(hostedLocatorsString, COMMA_DELIMITER);
hostedLocators = new ArrayList();
while (st.hasMoreTokens()) {
String locatorString = st.nextToken();
if (locatorString != null && !locatorString.isEmpty()) {
hostedLocators.add(locatorString);
}
}
if (hostedLocators.isEmpty()) {
hostedLocators = null;
}
}
return hostedLocators;
}
// /**
// * Check for the optional field {@link #HOSTED_LOCATORS_WITH_SHARED_CONFIGURATION} and return
// the
// * value or null.
// */
// Collection readHostedLocatorsWithSharedConfiguration() {
// if (this.optionalFields == null || this.optionalFields.isEmpty()) {
// return null;
// }
// Collection hostedLocatorsWithSharedConfiguration = null;
// String hostedLocatorsString =
// this.optionalFields.getProperty(HOSTED_LOCATORS_WITH_SHARED_CONFIGURATION);
// if (hostedLocatorsString != null && !hostedLocatorsString.isEmpty()) {
// StringTokenizer st = new StringTokenizer(hostedLocatorsString, COMMA_DELIMITER);
// hostedLocatorsWithSharedConfiguration = new ArrayList();
// while (st.hasMoreTokens()) {
// String locatorString = st.nextToken();
// if (locatorString != null && !locatorString.isEmpty()) {
// hostedLocatorsWithSharedConfiguration.add(locatorString);
// }
// }
// if (hostedLocatorsWithSharedConfiguration.isEmpty()) {
// hostedLocatorsWithSharedConfiguration = null;
// }
// }
// return hostedLocatorsWithSharedConfiguration;
// }
boolean readIsSharedConfigurationEnabled() {
if (this.optionalFields == null || this.optionalFields.isEmpty()) {
return false;
}
return Boolean.parseBoolean((this.optionalFields.getProperty(IS_SHARED_CONFIG_ENABLED)));
}
/**
* Write the value for the optional field {@link #HOSTED_LOCATORS}.
*/
void writeHostedLocators(Collection hostedLocators) {
if (this.optionalFields == null) {
return;
}
if (hostedLocators != null && !hostedLocators.isEmpty()) {
String hostedLocatorsString = asCommaDelimitedString(hostedLocators);
if (hostedLocatorsString != null && !hostedLocatorsString.isEmpty()) {
this.optionalFields.setProperty(HOSTED_LOCATORS, hostedLocatorsString);
}
}
}
// void writeHostedLocatorsWithSharedConfiguration(Collection
// hostedLocatorsWithSharedConfiguration) {
// if (this.optionalFields == null) {
// return;
// }
// if (hostedLocatorsWithSharedConfiguration != null &&
// !hostedLocatorsWithSharedConfiguration.isEmpty()) {
// String hostedLocatorsString = asCommaDelimitedString(hostedLocatorsWithSharedConfiguration);
// if (hostedLocatorsString != null && !hostedLocatorsString.isEmpty()) {
// this.optionalFields.setProperty(HOSTED_LOCATORS_WITH_SHARED_CONFIGURATION,
// hostedLocatorsString);
// }
// }
// }
//
void writeIsSharedConfigurationEnabled(boolean isSharedConfigurationEnabled) {
if (this.optionalFields == null) {
return;
}
this.optionalFields.setProperty(IS_SHARED_CONFIG_ENABLED,
Boolean.toString(isSharedConfigurationEnabled));
}
int readMcastPort() {
int result = 0;
if (this.optionalFields != null) {
String resultString = this.optionalFields.getProperty(MCAST_PORT);
if (resultString != null && !resultString.isEmpty()) {
result = Integer.parseInt(resultString);
}
}
return result;
}
void writeMcastPort(int mcastPort) {
if (this.optionalFields != null) {
if (mcastPort != 0) {
this.optionalFields.setProperty(MCAST_PORT, Integer.toString(mcastPort));
}
}
}
String readMcastHostAddress() {
String result = null;
if (this.optionalFields != null) {
result = this.optionalFields.getProperty(MCAST_HOST_ADDRESS);
}
return result;
}
void writeMcastHostAddress(String addr) {
if (this.optionalFields != null) {
if (addr != null && !addr.isEmpty()) {
this.optionalFields.setProperty(MCAST_HOST_ADDRESS, addr);
}
}
}
/**
* Writes all optional fields to the DataOutput or null for minimal wire footprint.
*
* @throws IOException
*/
void writeTo(DataOutput out) throws IOException {
if (this.optionalFields.isEmpty()) {
DataSerializer.writeObject(null, out);
} else {
DataSerializer.writeObject(this.optionalFields, out);
}
}
/**
* Returns {@link #optionalFields} for testing.
*/
Properties getOptionalFields() {
return this.optionalFields;
}
/**
* Marshals a collection of strings to a single comma-delimited string. Returns null if collection
* is null or empty.
*/
public static String asCommaDelimitedString(Collection strings) {
StringBuilder sb = new StringBuilder();
for (String string : strings) {
if (sb.length() > 0) {
sb.append(COMMA_DELIMITER);
}
sb.append(string);
}
return sb.toString();
}
}