root / src / disk / ChunkManagement.java @ 3
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package disk; |
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import java.util.HashMap; |
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import java.util.HashSet; |
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import java.util.Map; |
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import java.util.concurrent.BlockingQueue; |
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import java.util.concurrent.LinkedBlockingDeque; |
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import chunk.Chunk; |
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/**
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* ChunkManagement
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*/
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public class ChunkManagement { |
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private static ChunkManagement chunkManagementInstance = null; |
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private Map<String, Map<Integer, Integer>> storesCounter; |
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private BlockingQueue<Chunk> restoreChunks; |
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private ChunkManagement() {
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storesCounter = new HashMap<String, Map<Integer, Integer>>(); |
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restoreChunks = new LinkedBlockingDeque<Chunk>();
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} |
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public static ChunkManagement getInstance() { |
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if (chunkManagementInstance == null) { |
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chunkManagementInstance = new ChunkManagement();
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} |
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return chunkManagementInstance;
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} |
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public int getStores(String fileId, int chunkNo) { |
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if (!storesCounter.containsKey(fileId)){
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return 0; |
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} |
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if (!storesCounter.get(fileId).containsKey(chunkNo)){
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return 0; |
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} |
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return storesCounter.get(fileId).get(chunkNo);
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} |
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public int registerStored(String fileId, int chunkNo) { |
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if (!storesCounter.containsKey(fileId)) {
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storesCounter.put(fileId, new HashMap<Integer, Integer>()); |
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} |
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if (!storesCounter.get(fileId).containsKey(chunkNo)) {
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storesCounter.get(fileId).put(chunkNo, 1);
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} else {
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int nStores = storesCounter.get(fileId).get(chunkNo);
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storesCounter.get(fileId).put(chunkNo, nStores + 1);
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} |
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return storesCounter.get(fileId).get(chunkNo);
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} |
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public int registerRemoved(String fileId, int chunkNo) { |
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if (!storesCounter.containsKey(fileId)) {
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return 0; |
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} |
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if (!storesCounter.get(fileId).containsKey(chunkNo)) {
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return 0; |
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} else {
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int nStores = storesCounter.get(fileId).get(chunkNo);
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storesCounter.get(fileId).put(chunkNo, nStores - 1);
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return storesCounter.get(fileId).get(chunkNo);
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} |
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} |
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public void deleteStores(String fileId) { |
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storesCounter.remove(fileId); |
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} |
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public void addRestoreChunk(Chunk chunk) { |
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restoreChunks.add(chunk); |
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} |
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/**
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* @return the restoreChunks
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*/
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public BlockingQueue<Chunk> getRestoreChunks() { |
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return restoreChunks;
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} |
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} |