Flume NG与MySQL整合开发
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1 pom文件配置
<dependencies> <dependency> <groupId>org.apache.flume</groupId> <artifactId>flume-ng-configuration</artifactId> <version>1.5.2</version> </dependency> <dependency> <groupId>org.apache.flume</groupId> <artifactId>flume-ng-core</artifactId> <version>1.5.2</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.26</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.0.27</version> </dependency></dependencies>2 java代码实现
package cn.gcks;import java.sql.Connection;import java.sql.DriverManager;import java.sql.PreparedStatement;import java.sql.SQLException;import java.util.List;import java.util.regex.Pattern;import org.apache.flume.Channel;import org.apache.flume.Context;import org.apache.flume.Event;import org.apache.flume.EventDeliveryException;import org.apache.flume.Transaction;import org.apache.flume.conf.Configurable;import org.apache.flume.sink.AbstractSink;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import com.google.common.base.Preconditions;import com.google.common.base.Throwables;import com.google.common.collect.Lists;/** * Flume收集文件到MySQL * * @author 林志明 * */public class MySQLSink extends AbstractSink implements Configurable { private Logger logger = LoggerFactory.getLogger(MySQLSink.class); private String hostname; private String port; private String databaseName; private String tableName; private String user; private String password; private PreparedStatement preparedStatement; private Connection conn; private int batchSize; private String columnName; private String fieldSeparator; private int columnNumber; public MySQLSink() { logger.info("MysqlSink start..."); } Pattern pattern = null; @Override public void configure(Context context) { hostname = context.getString("hostname"); Preconditions.checkNotNull(hostname, "hostname must be set!!"); port = context.getString("port"); Preconditions.checkNotNull(port, "port must be set!!"); databaseName = context.getString("databaseName"); Preconditions.checkNotNull(databaseName, "databaseName must be set!!"); tableName = context.getString("tableName"); Preconditions.checkNotNull(tableName, "tableName must be set!!"); user = context.getString("user"); Preconditions.checkNotNull(user, "user must be set!!"); password = context.getString("password"); Preconditions.checkNotNull(password, "password must be set!!"); batchSize = context.getInteger("batchSize", 100); Preconditions.checkNotNull(batchSize > 0, "batchSize must be a positive number!!"); columnName = context.getString("column_name"); Preconditions.checkNotNull(columnName, "column_name must be set!!"); fieldSeparator = context.getString("field_separator"); Preconditions.checkNotNull(fieldSeparator, "field_separator must be set!!"); pattern = Pattern.compile(fieldSeparator); } private String sql = null; @Override public void start() { super.start(); String url = CommonUtils.append("jdbc:mysql://", hostname, ":", port, "/", databaseName, "?Unicode=true&characterEncoding=UTF-8"); try { conn = DataSourceFactory.getConnection(url, user, password); conn.setAutoCommit(false); // 创建一个Statement对象 String[] columns = columnName.split(","); String values = null; StringBuffer stringBuffer = new StringBuffer(); int i = 0; columnNumber = columns.length; while (i < columnNumber) { stringBuffer.append("?").append(","); i++; } values = stringBuffer.substring(0, stringBuffer.length() - 1).toString(); sql = "insert into " + tableName + " (" + columnName + ") values (" + values + ")"; } catch (SQLException e) { e.printStackTrace(); System.exit(1); } } @Override public void stop() { super.stop(); DataSourceFactory.closeCon(preparedStatement, conn); } @Override public Status process() throws EventDeliveryException { try { preparedStatement = conn.prepareStatement(sql); logger.info("===preparedStatement Alive==="); } catch (SQLException e1) { e1.printStackTrace(); } Status result = Status.READY; Channel channel = getChannel(); Transaction transaction = channel.getTransaction(); Event event; String content; List<String> actions = Lists.newArrayList(); transaction.begin(); try { for (int i = 0; i < batchSize; i++) { event = channel.take(); if (event != null) { content = new String(event.getBody()); actions.add(content); } else { result = Status.BACKOFF; break; } } if (actions.size() > 0) { preparedStatement.clearBatch(); for (String temp : actions) { String[] datas = {}; if (temp != null && temp.trim().length() != 0) { datas = pattern.split(temp); } for (int i = 0; i < columnNumber; i++) { if (i > datas.length - 1) { preparedStatement.setString(i + 1, null); } else { preparedStatement.setString(i + 1, datas[i]); } } preparedStatement.addBatch(); } preparedStatement.executeBatch(); conn.commit(); } transaction.commit(); } catch (Throwable e) { try { transaction.rollback(); } catch (Exception e2) { logger.error("Exception in rollback. Rollback might not have been" + "successful.", e2); } logger.error("Failed to commit transaction." + "Transaction rolled back.", e); Throwables.propagate(e); } finally { transaction.close(); } return result; }}package cn.gcks;import java.sql.Connection;import java.sql.PreparedStatement;import java.sql.ResultSet;import org.apache.log4j.Logger;import com.alibaba.druid.pool.DruidDataSource;/** * 数据库连接 * * @author linzm * */public class DataSourceFactory { private static Logger log = Logger.getLogger(DataSourceFactory.class); private static DruidDataSource dataSource = null; /** * 创建数据源 * * @return */ public static DruidDataSource getDataSource(String url, String userName, String password) throws Exception { if (dataSource == null) { log.info("数据库连接信息：[url:" + url + ",userName:" + userName + ",password:" + password + "]"); dataSource = new DruidDataSource(); dataSource.setUrl(url); dataSource.setUsername(userName); dataSource.setPassword(password); dataSource.setMaxActive(15);// 设置最大并发数 dataSource.setInitialSize(2);// 数据库初始化时，创建的连接个数 dataSource.setMaxWait(60000); dataSource.setMinIdle(1);// 最小空闲连接数 dataSource.setTimeBetweenEvictionRunsMillis(5 * 60 * 1000);// 5分钟检测一次是否有死掉的线程 dataSource.setMinEvictableIdleTimeMillis(300000);// 空闲连接60秒中后释放 dataSource.setTestWhileIdle(true); // 检测连接有效性 dataSource.setTestOnBorrow(true); dataSource.setValidationQuery("select 1"); dataSource.setPoolPreparedStatements(true); dataSource.setMaxOpenPreparedStatements(15); } return dataSource; } /** * 释放数据源 */ public static void shutDownDataSource() throws Exception { if (dataSource != null) { dataSource.close(); } } /** * 获取数据库连接 * * @return */ public static Connection getConnection(String url, String userName, String password) { Connection con = null; try { if (dataSource != null) { con = dataSource.getConnection(); } else { con = getDataSource(url, userName, password).getConnection(); } } catch (Exception e) { log.error(e.getMessage(), e); } return con; } /** * 关闭连接 */ public static void closeCon(PreparedStatement ps, Connection con) { if (ps != null) { try { ps.close(); } catch (Exception e) { log.error("预编译SQL语句对象PreparedStatement关闭异常！" + e.getMessage(), e); } } if (con != null) { try { con.close(); } catch (Exception e) { log.error("关闭连接对象Connection异常！" + e.getMessage(), e); } } }}package cn.gcks;import java.text.ParseException;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Locale;import java.util.regex.Matcher;import java.util.regex.Pattern;public class CommonUtils { public static final String EMPTY = ""; /** * Represents a failed index search. * * @since 2.1 */ public static final int INDEX_NOT_FOUND = -1; /** * <p> * The maximum size to which the padding constant(s) can expand. * </p> */ // private static final int PAD_LIMIT = 8192; /** * <p> * Checks if a String is whitespace, empty ("") or null. * </p> * <p> * <pre> * StringUtils.isBlank(null) = true * StringUtils.isBlank("") = true * StringUtils.isBlank(" ") = true * StringUtils.isBlank("bob") = false * StringUtils.isBlank(" bob ") = false * </pre> * * @param str the String to check, may be null * @return <code>true</code> if the String is null, empty or whitespace * @since 2.0 */ public static boolean isBlank(String str) { int strLen; if (str == null || (strLen = str.length()) == 0) { return true; } for (int i = 0; i < strLen; i++) { if ((Character.isWhitespace(str.charAt(i)) == false)) { return false; } } return true; } /** * <p> * Checks if a String is whitespace, empty ("") or null. * </p> * <p> * <pre> * StringUtils.isBlank(null) = true * StringUtils.isBlank("") = true * StringUtils.isBlank(" ") = true * StringUtils.isBlank("bob") = false * StringUtils.isBlank(" bob ") = false * </pre> * * @param str the String to check, may be null * @return <code>true</code> if the String is null, empty or whitespace * @since 2.0 */ public static boolean isNotBlank(String str) { return !isBlank(str); } public static Long parseLong(String str) { try { return Long.parseLong(str); } catch (Exception ex) { return 0L; } } public static String toCNDateTimeString(Date date) { SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); return sf.format(date); } public static int strLengthContainBlank(String str) { return isBlank(str) ? 0 : str.length(); } /** * <p> * Gets a substring from the specified String avoiding exceptions. * </p> * <p> * <p> * A negative start position can be used to start/end <code>n</code> * characters from the end of the String. * </p> * <p> * <p> * The returned substring starts with the character in the * <code>start</code> position and ends before the <code>end</code> * position. All position counting is zero-based -- i.e., to start at the * beginning of the string use <code>start = 0</code>. Negative start and * end positions can be used to specify offsets relative to the end of the * String. * </p> * <p> * <p> * If <code>start</code> is not strictly to the left of <code>end</code>, "" * is returned. * </p> * <p> * <pre> * StringUtils.substring(null, *, *) = null * StringUtils.substring("", * , *) = ""; * StringUtils.substring("abc", 0, 2) = "ab" * StringUtils.substring("abc", 2, 0) = "" * StringUtils.substring("abc", 2, 4) = "c" * StringUtils.substring("abc", 4, 6) = "" * StringUtils.substring("abc", 2, 2) = "" * StringUtils.substring("abc", -2, -1) = "b" * StringUtils.substring("abc", -4, 2) = "ab" * </pre> * * @param str the String to get the substring from, may be null * @param start the position to start from, negative means count back from the * end of the String by this many characters * @param end the position to end at (exclusive), negative means count back * from the end of the String by this many characters * @return substring from start position to end positon, <code>null</code> * if null String input */ public static String substring(String str, int start, int end) { if (str == null) { return null; } // handle negatives if (end < 0) { end = str.length() + end; // remember end is negative } if (start < 0) { start = str.length() + start; // remember start is negative } // check length next if (end > str.length()) { end = str.length(); } // if start is greater than end, return "" if (start > end) { return EMPTY; } if (start < 0) { start = 0; } if (end < 0) { end = 0; } return str.substring(start, end); } public static String append(String... strings) { StringBuffer stringBuffer = new StringBuffer(); for (String string : strings) { stringBuffer.append(string); } return stringBuffer.toString(); } public static String appendWithOperator(String operator, Object... objs) { StringBuffer stringBuffer = new StringBuffer(); for (Object obj : objs) { if (obj instanceof Object[]) { Object[] arr = (Object[]) obj; for (Object obj2 : arr) { stringBuffer.append(obj2).append(operator); } } else { stringBuffer.append(obj).append(operator); } } return substring(stringBuffer.toString(), 0, -1); } public static String appendWithOperatorReplaceString(String operator, String nullReplaceString, Object... objs) { StringBuffer stringBuffer = new StringBuffer(); for (Object obj : objs) { if (obj != null && isBlank(obj.toString())) { obj = nullReplaceString; } if (obj instanceof Object[]) { Object[] arr = (Object[]) obj; for (Object obj2 : arr) { if (obj2 == null) { obj2 = nullReplaceString; } stringBuffer.append(obj2).append(operator); } } else { stringBuffer.append(obj).append(operator); } } return substring(stringBuffer.toString(), 0, -1); } public static boolean equals(String str1, String str2) { return str1 == null ? str2 == null : str1.equals(str2); } public static boolean notEquals(String str1, String str2) { return !(str1 == null ? str2 == null : str1.equals(str2)); } /** * <p> * Checks if String contains a search String, handling <code>null</code>. * This method uses {@link String#indexOf(String)}. * </p> * <p> * <p> * A <code>null</code> String will return <code>false</code>. * </p> * <p> * <pre> * StringUtils.contains(null, *) = false * StringUtils.contains(*, null) = false * StringUtils.contains("", "") = true * StringUtils.contains("abc", "") = true * StringUtils.contains("abc", "a") = true * StringUtils.contains("abc", "z") = false * </pre> * * @param str the String to check, may be null * @param searchStr the String to find, may be null * @return true if the String contains the search String, false if not or * <code>null</code> string input * @since 2.0 */ public static boolean contains(String str, String searchStr) { if (str == null || searchStr == null) { return false; } return str.indexOf(searchStr) >= 0; } public static String[] split(String str, String operator, Pattern pattern) { if (str == null || operator == null) { return null; } else { if (contains(str, operator)) { return pattern.split(str); } else { return null; } } } // StripAll // ----------------------------------------------------------------------- /** * <p> * Strips whitespace from the start and end of every String in an array. * Whitespace is defined by {@link Character#isWhitespace(char)}. * </p> * <p> * <p> * A new array is returned each time, except for length zero. A * <code>null</code> array will return <code>null</code>. An empty array * will return itself. A <code>null</code> array entry will be ignored. * </p> * <p> * <pre> * StringUtils.stripAll(null) = null * StringUtils.stripAll([]) = [] * StringUtils.stripAll(["abc", " abc"]) = ["abc", "abc"] * StringUtils.stripAll(["abc ", null]) = ["abc", null] * </pre> * * @param strs the array to remove whitespace from, may be null * @return the stripped Strings, <code>null</code> if null array input */ public static String[] stripAll(String[] strs) { return stripAll(strs, null); } /** * <p> * Strips any of a set of characters from the start and end of every String * in an array. * </p> * Whitespace is defined by {@link Character#isWhitespace(char)}. * </p> * <p> * <p> * A new array is returned each time, except for length zero. A * <code>null</code> array will return <code>null</code>. An empty array * will return itself. A <code>null</code> array entry will be ignored. A * <code>null</code> stripChars will strip whitespace as defined by * {@link Character#isWhitespace(char)}. * </p> * <p> * <pre> * StringUtils.stripAll(null, *) = null * StringUtils.stripAll([], *) = [] * StringUtils.stripAll(["abc", " abc"], null) = ["abc", "abc"] * StringUtils.stripAll(["abc ", null], null) = ["abc", null] * StringUtils.stripAll(["abc ", null], "yz") = ["abc ", null] * StringUtils.stripAll(["yabcz", null], "yz") = ["abc", null] * </pre> * * @param strs the array to remove characters from, may be null * @param stripChars the characters to remove, null treated as whitespace * @return the stripped Strings, <code>null</code> if null array input */ public static String[] stripAll(String[] strs, String stripChars) { int strsLen; if (strs == null || (strsLen = strs.length) == 0) { return strs; } String[] newArr = new String[strsLen]; for (int i = 0; i < strsLen; i++) { newArr[i] = strip(strs[i], stripChars); } return newArr; } /** * <p> * Strips any of a set of characters from the start and end of a String. * This is similar to {@link String#trim()} but allows the characters to be * stripped to be controlled. * </p> * <p> * <p> * A <code>null</code> input String returns <code>null</code>. An empty * string ("") input returns the empty string. * </p> * <p> * <p> * If the stripChars String is <code>null</code>, whitespace is stripped as * defined by {@link Character#isWhitespace(char)}. Alternatively use * {@link #strip(String)}. * </p> * <p> * <pre> * StringUtils.strip(null, *) = null * StringUtils.strip("", *) = "" * StringUtils.strip("abc", null) = "abc" * StringUtils.strip(" abc", null) = "abc" * StringUtils.strip("abc ", null) = "abc" * StringUtils.strip(" abc ", null) = "abc" * StringUtils.strip(" abcyx", "xyz") = " abc" * </pre> * * @param str the String to remove characters from, may be null * @param stripChars the characters to remove, null treated as whitespace * @return the stripped String, <code>null</code> if null String input */ public static String strip(String str, String stripChars) { if (isEmpty(str)) { return str; } str = stripStart(str, stripChars); return stripEnd(str, stripChars); } /** * <p> * Strips any of a set of characters from the start of a String. * </p> * <p> * <p> * A <code>null</code> input String returns <code>null</code>. An empty * string ("") input returns the empty string. * </p> * <p> * <p> * If the stripChars String is <code>null</code>, whitespace is stripped as * defined by {@link Character#isWhitespace(char)}. * </p> * <p> * <pre> * StringUtils.stripStart(null, *) = null * StringUtils.stripStart("", *) = "" * StringUtils.stripStart("abc", "") = "abc" * StringUtils.stripStart("abc", null) = "abc" * StringUtils.stripStart(" abc", null) = "abc" * StringUtils.stripStart("abc ", null) = "abc " * StringUtils.stripStart(" abc ", null) = "abc " * StringUtils.stripStart("yxabc ", "xyz") = "abc " * </pre> * * @param str the String to remove characters from, may be null * @param stripChars the characters to remove, null treated as whitespace * @return the stripped String, <code>null</code> if null String input */ public static String stripStart(String str, String stripChars) { int strLen; if (str == null || (strLen = str.length()) == 0) { return str; } int start = 0; if (stripChars == null) { while ((start != strLen) && Character.isWhitespace(str.charAt(start))) { start++; } } else if (stripChars.length() == 0) { return str; } else { while ((start != strLen) && (stripChars.indexOf(str.charAt(start)) != INDEX_NOT_FOUND)) { start++; } } return str.substring(start); } /** * <p> * Strips any of a set of characters from the end of a String. * </p> * <p> * <p> * A <code>null</code> input String returns <code>null</code>. An empty * string ("") input returns the empty string. * </p> * <p> * <p> * If the stripChars String is <code>null</code>, whitespace is stripped as * defined by {@link Character#isWhitespace(char)}. * </p> * <p> * <pre> * StringUtils.stripEnd(null, *) = null * StringUtils.stripEnd("", *) = "" * StringUtils.stripEnd("abc", "") = "abc" * StringUtils.stripEnd("abc", null) = "abc" * StringUtils.stripEnd(" abc", null) = " abc" * StringUtils.stripEnd("abc ", null) = "abc" * StringUtils.stripEnd(" abc ", null) = " abc" * StringUtils.stripEnd(" abcyx", "xyz") = " abc" * StringUtils.stripEnd("120.00", ".0") = "12" * </pre> * * @param str the String to remove characters from, may be null * @param stripChars the set of characters to remove, null treated as whitespace * @return the stripped String, <code>null</code> if null String input */ public static String stripEnd(String str, String stripChars) { int end; if (str == null || (end = str.length()) == 0) { return str; } if (stripChars == null) { while ((end != 0) && Character.isWhitespace(str.charAt(end - 1))) { end--; } } else if (stripChars.length() == 0) { return str; } else { while ((end != 0) && (stripChars.indexOf(str.charAt(end - 1)) != INDEX_NOT_FOUND)) { end--; } } return str.substring(0, end); } // Empty checks // ----------------------------------------------------------------------- /** * <p> * Checks if a String is empty ("") or null. * </p> * <p> * <pre> * StringUtils.isEmpty(null) = true * StringUtils.isEmpty("") = true * StringUtils.isEmpty(" ") = false * StringUtils.isEmpty("bob") = false * StringUtils.isEmpty(" bob ") = false * </pre> * <p> * <p> * NOTE: This method changed in Lang version 2.0. It no longer trims the * String. That functionality is available in isBlank(). * </p> * * @param str the String to check, may be null * @return <code>true</code> if the String is empty or null */ public static boolean isEmpty(String str) { return str == null || str.length() == 0; } // Stripping // ----------------------------------------------------------------------- /** * <p> * Strips whitespace from the start and end of a String. * </p> * <p> * <p> * This is similar to {@link (String)} but removes whitespace. * Whitespace is defined by {@link Character#isWhitespace(char)}. * </p> * <p> * <p> * A <code>null</code> input String returns <code>null</code>. * </p> * <p> * <pre> * StringUtils.strip(null) = null * StringUtils.strip("") = "" * StringUtils.strip(" ") = "" * StringUtils.strip("abc") = "abc" * StringUtils.strip(" abc") = "abc" * StringUtils.strip("abc ") = "abc" * StringUtils.strip(" abc ") = "abc" * StringUtils.strip(" ab c ") = "ab c" * </pre> * * @param str the String to remove whitespace from, may be null * @return the stripped String, <code>null</code> if null String input */ public static String strip(String str) { return strip(str, null); } /** * <p> * Converts a String to lower case as per {@link String#toLowerCase()}. * </p> * <p> * <p> * A <code>null</code> input String returns <code>null</code>. * </p> * <p> * <pre> * StringUtils.lowerCase(null) = null * StringUtils.lowerCase("") = "" * StringUtils.lowerCase("aBc") = "abc" * </pre> * <p> * <p> * <strong>Note:</strong> As described in the documentation for * {@link String#toLowerCase()}, the result of this method is affected by * the current locale. For platform-independent case transformations, the * method {@link (String, Locale)} should be used with a specific * locale (e.g. {@link Locale#ENGLISH}). * </p> * * @param str the String to lower case, may be null * @return the lower cased String, <code>null</code> if null String input */ public static String toLowerCase(String str) { if (isBlank(str)) { return str; } return str.toLowerCase(); } public static String normalDateToConnectorDate (String time){ SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); SimpleDateFormat format2 = new SimpleDateFormat("yyyyMMddHHmmss"); Date date = null; try { date = format.parse(time); } catch (ParseException e) { e.toString(); return null; } return format2.format(date); }}3 打包java代码，上传jar包和mysql驱动包到flume的lib目录
进入源码的根目录执行mvn install -DskipTests -Dtar
4 创建MySQL表
CREATE TABLE `test_flume_sink` ( `id` int(11) NOT NULL AUTO_INCREMENT, `content` varchar(255) DEFAULT NULL, `log2` bigint(25) DEFAULT NULL, PRIMARY KEY (`id`)) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;5 修改flume配置文件
agent.sinks.mysqlSink.type = cn.bfire.MySQLSinkagent.sinks.mysqlSink.hostname=1.1.1.1agent.sinks.mysqlSink.port=3306agent.sinks.mysqlSink.databaseName=bigdataagent.sinks.mysqlSink.tableName=test_flume_sinkagent.sinks.mysqlSink.user=miagent.sinks.mysqlSink.password=11111111agent.sinks.mysqlSink.column_name=content,log2agent.sinks.mysqlSink.field_separator=\\|6 flume收集文件内容
abc|dddeee|fffaaa,gggddd|fffsss|jjjfff,fffaaaaaa|gg|fffffaaaaa,bbbbbbbbbb,cccccdddddd|eeeeeee|aaxxxx|eeeezzz|aaa,bbb|xxzz7 MySQL表收集结果
8 遇到的问题【如果使用flume1.6.0下面的内容属于无聊】
错误日志：
java.lang.IllegalStateException: File should not roll when commit is outstanding. at org.apache.flume.client.avro.ReliableSpoolingFileEventReader.readEvents(ReliableSpoolingFileEventReader.java:221) at org.apache.flume.source.SpoolDirectorySource$SpoolDirectoryRunnable.run(SpoolDirectorySource.java:227) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745)原因 ： flume收集目录中有文件大小为0 
不过，这是flume1.6.0之前版本的BUG
https://issues.apache.org/jira/browse/FLUME-1934
http://flume.apache.org/releases/1.6.0.html
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