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17 package org.apache.logging.log4j.core.appender;
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19 import java.io.Serializable;
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21 import org.apache.logging.log4j.core.Filter;
22 import org.apache.logging.log4j.core.Layout;
23 import org.apache.logging.log4j.core.LogEvent;
24 import org.apache.logging.log4j.core.util.Constants;
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31 public abstract class AbstractOutputStreamAppender<M extends OutputStreamManager> extends AbstractAppender {
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39 private final boolean immediateFlush;
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41 private final M manager;
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51 protected AbstractOutputStreamAppender(final String name, final Layout<? extends Serializable> layout,
52 final Filter filter, final boolean ignoreExceptions, final boolean immediateFlush, final M manager) {
53 super(name, filter, layout, ignoreExceptions);
54 this.manager = manager;
55 this.immediateFlush = immediateFlush;
56 }
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63 public boolean getImmediateFlush() {
64 return immediateFlush;
65 }
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72 public M getManager() {
73 return manager;
74 }
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76 @Override
77 public void start() {
78 if (getLayout() == null) {
79 LOGGER.error("No layout set for the appender named [" + getName() + "].");
80 }
81 if (manager == null) {
82 LOGGER.error("No OutputStreamManager set for the appender named [" + getName() + "].");
83 }
84 super.start();
85 }
86
87 @Override
88 public void stop() {
89 super.stop();
90 manager.release();
91 }
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101 @Override
102 public void append(final LogEvent event) {
103 try {
104 tryAppend(event);
105 } catch (final AppenderLoggingException ex) {
106 error("Unable to write to stream " + manager.getName() + " for appender " + getName() + ": " + ex);
107 throw ex;
108 }
109 }
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111 private void tryAppend(final LogEvent event) {
112 if (Constants.ENABLE_DIRECT_ENCODERS) {
113 directEncodeEvent(event);
114 } else {
115 writeByteArrayToManager(event);
116 }
117 }
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119 protected void directEncodeEvent(final LogEvent event) {
120 getLayout().encode(event, manager);
121 if (this.immediateFlush || event.isEndOfBatch()) {
122 manager.flush();
123 }
124 }
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126 protected void writeByteArrayToManager(final LogEvent event) {
127 final byte[] bytes = getLayout().toByteArray(event);
128 if (bytes != null && bytes.length > 0) {
129 manager.write(bytes, this.immediateFlush || event.isEndOfBatch());
130 }
131 }
132 }