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我創建了一個文件helloworld.txt。現在我正在讀取文件,然後我想將文件的內容加載到緩存中,並且每當緩存更新時,它也應該寫入文件。如何從文本文件讀取時加載Apache Ignite Cache
這是我到目前爲止的代碼:
請告訴我該怎麼加載緩存,然後從緩存中的文件寫,因爲指令不是來自Apache的點燃文檔清楚。
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import org.apache.ignite.Ignite;
import org.apache.ignite.IgniteCache;
import org.apache.ignite.IgniteDataStreamer;
import org.apache.ignite.IgniteException;
import org.apache.ignite.Ignition;
import org.apache.ignite.examples.ExampleNodeStartup;
import org.apache.ignite.examples.ExamplesUtils;
public class FileRead {
/** Cache name. */
private static final String CACHE_NAME = "FileCache";
/** Heap size required to run this example. */
public static final int MIN_MEMORY = 512 * 1024 * 1024;
/**
* Executes example.
*
* @param args Command line arguments, none required.
* @throws IgniteException If example execution failed.
*/
public static void main(String[] args) throws IgniteException {
ExamplesUtils.checkMinMemory(MIN_MEMORY);
try (Ignite ignite = Ignition.start("examples/config/example-ignite.xml")) {
System.out.println();
try (IgniteCache<Integer, String> cache = ignite.getOrCreateCache(CACHE_NAME)) {
long start = System.currentTimeMillis();
try (IgniteDataStreamer<Integer, String> stmr = ignite.dataStreamer(CACHE_NAME)) {
// Configure loader.
stmr.perNodeBufferSize(1024);
stmr.perNodeParallelOperations(8);
///FileReads();
try {
BufferedReader in = new BufferedReader
(new FileReader("/Users/akritibahal/Desktop/helloworld.txt"));
String str;
int i=0;
while ((str = in.readLine()) != null) {
System.out.println(str);
stmr.addData(i,str);
i++;
}
System.out.println("Loaded " + i + " keys.");
}
catch (IOException e) {
}
}
}
}
}
}
我不知道如何從緩存中讀取,寫入文件並更新到文件中。我如何獲得存儲在這種情況下的密鑰? – user3591433