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17 package org.apache.logging.log4j.flume.appender;
18
19 import org.apache.flume.Event;
20 import org.apache.flume.api.RpcClient;
21 import org.apache.flume.api.RpcClientFactory;
22 import org.apache.logging.log4j.core.appender.AppenderRuntimeException;
23 import org.apache.logging.log4j.core.appender.ManagerFactory;
24
25 import java.util.Properties;
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30 public class FlumeAvroManager extends AbstractFlumeManager {
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32 private static final int MAX_RECONNECTS = 3;
33
34 private static ManagerFactory factory = new AvroManagerFactory();
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36 private final Agent[] agents;
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38 private final int batchSize;
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40 private final int retries;
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42 private final int connectTimeout;
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44 private final int requestTimeout;
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46 private int current = 0;
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48 private RpcClient rpcClient = null;
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60 protected FlumeAvroManager(final String name, final String shortName, final Agent[] agents, final int batchSize,
61 final int retries, final int connectTimeout, final int requestTimeout) {
62 super(name);
63 this.agents = agents;
64 this.batchSize = batchSize;
65 this.retries = retries;
66 this.connectTimeout = connectTimeout;
67 this.requestTimeout = requestTimeout;
68 this.rpcClient = connect(agents, retries, connectTimeout, requestTimeout);
69 }
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78 public static FlumeAvroManager getManager(final String name, final Agent[] agents, int batchSize,
79 final int retries, final int connectTimeout, final int requestTimeout) {
80 if (agents == null || agents.length == 0) {
81 throw new IllegalArgumentException("At least one agent is required");
82 }
83
84 if (batchSize <= 0) {
85 batchSize = 1;
86 }
87
88 final StringBuilder sb = new StringBuilder("FlumeAvro[");
89 boolean first = true;
90 for (final Agent agent : agents) {
91 if (!first) {
92 sb.append(",");
93 }
94 sb.append(agent.getHost()).append(":").append(agent.getPort());
95 first = false;
96 }
97 sb.append("]");
98 return (FlumeAvroManager) getManager(sb.toString(), factory, new FactoryData(name, agents, batchSize, retries,
99 connectTimeout, requestTimeout));
100 }
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106 public Agent[] getAgents() {
107 return agents;
108 }
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114 public int getCurrent() {
115 return current;
116 }
117
118 public int getRetries() {
119 return retries;
120 }
121
122 public int getConnectTimeout() {
123 return connectTimeout;
124 }
125
126 public int getRequestTimeout() {
127 return requestTimeout;
128 }
129
130 public synchronized void send(final BatchEvent events) {
131 if (rpcClient == null) {
132 rpcClient = connect(agents, retries, connectTimeout, requestTimeout);
133 }
134
135 if (rpcClient != null) {
136 try {
137 rpcClient.appendBatch(events.getEvents());
138 } catch (final Exception ex) {
139 rpcClient.close();
140 rpcClient = null;
141 String msg = "Unable to write to " + getName() + " at " + agents[current].getHost() + ":" +
142 agents[current].getPort();
143 LOGGER.warn(msg, ex);
144 throw new AppenderRuntimeException("No Flume agents are available");
145 }
146 }
147 }
148
149 @Override
150 public synchronized void send(final Event event) {
151 if (rpcClient == null) {
152 rpcClient = connect(agents, retries, connectTimeout, requestTimeout);
153 }
154
155 if (rpcClient != null) {
156 try {
157 rpcClient.append(event);
158 } catch (final Exception ex) {
159 rpcClient.close();
160 rpcClient = null;
161 String msg = "Unable to write to " + getName() + " at " + agents[current].getHost() + ":" +
162 agents[current].getPort();
163 LOGGER.warn(msg, ex);
164 throw new AppenderRuntimeException("No Flume agents are available");
165 }
166 }
167 }
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175 private RpcClient connect(final Agent[] agents, int retries, int connectTimeout, int requestTimeout) {
176 Properties props = new Properties();
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178 props.put("client.type", agents.length > 1 ? "default_failover" : "default");
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180 int count = 1;
181 StringBuilder sb = new StringBuilder();
182 for (Agent agent : agents) {
183 if (sb.length() > 0) {
184 sb.append(" ");
185 }
186 String hostName = "host" + count++;
187 props.put("hosts." + hostName, agent.getHost() + ":" + agent.getPort());
188 sb.append(hostName);
189 }
190 props.put("hosts", sb.toString());
191 if (batchSize > 0) {
192 props.put("batch-size", Integer.toString(batchSize));
193 }
194 if (retries > 1) {
195 if (retries > MAX_RECONNECTS) {
196 retries = MAX_RECONNECTS;
197 }
198 props.put("max-attempts", Integer.toString(retries * agents.length));
199 }
200 if (requestTimeout >= 1000) {
201 props.put("request-timeout", Integer.toString(requestTimeout));
202 }
203 if (connectTimeout >= 1000) {
204 props.put("connect-timeout", Integer.toString(connectTimeout));
205 }
206 return RpcClientFactory.getInstance(props);
207 }
208
209 @Override
210 protected void releaseSub() {
211 if (rpcClient != null) {
212 try {
213 rpcClient.close();
214 } catch (final Exception ex) {
215 LOGGER.error("Attempt to close RPC client failed", ex);
216 }
217 }
218 rpcClient = null;
219 }
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224 private static class FactoryData {
225 private final String name;
226 private final Agent[] agents;
227 private final int batchSize;
228 private final int retries;
229 private final int conntectTimeout;
230 private final int requestTimeout;
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238 public FactoryData(final String name, final Agent[] agents, final int batchSize, final int retries,
239 final int connectTimeout, final int requestTimeout) {
240 this.name = name;
241 this.agents = agents;
242 this.batchSize = batchSize;
243 this.retries = retries;
244 this.conntectTimeout = connectTimeout;
245 this.requestTimeout = requestTimeout;
246 }
247 }
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252 private static class AvroManagerFactory implements ManagerFactory<FlumeAvroManager, FactoryData> {
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260 public FlumeAvroManager createManager(final String name, final FactoryData data) {
261 try {
262
263 return new FlumeAvroManager(name, data.name, data.agents, data.batchSize, data.retries,
264 data.conntectTimeout, data.requestTimeout);
265 } catch (final Exception ex) {
266 LOGGER.error("Could not create FlumeAvroManager", ex);
267 }
268 return null;
269 }
270 }
271
272 }