HDFS-12171. Reduce IIP object allocations for inode lookup. Contributed by Daryn Sharp.
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@ -209,9 +209,8 @@ public class EncryptionZoneManager {
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if (!hasCreatedEncryptionZone()) {
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return null;
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}
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List<INode> inodes = iip.getReadOnlyINodes();
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for (int i = inodes.size() - 1; i >= 0; i--) {
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final INode inode = inodes.get(i);
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for (int i = iip.length() - 1; i >= 0; i--) {
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final INode inode = iip.getINode(i);
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if (inode != null) {
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final EncryptionZoneInt ezi = encryptionZones.get(inode.getId());
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if (ezi != null) {
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@ -355,9 +355,8 @@ final class FSDirErasureCodingOp {
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Preconditions.checkNotNull(iip, "INodes cannot be null");
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fsd.readLock();
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try {
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List<INode> inodes = iip.getReadOnlyINodes();
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for (int i = inodes.size() - 1; i >= 0; i--) {
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final INode inode = inodes.get(i);
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for (int i = iip.length() - 1; i >= 0; i--) {
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final INode inode = iip.getINode(i);
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if (inode == null) {
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continue;
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}
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@ -18,9 +18,6 @@
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package org.apache.hadoop.hdfs.server.namenode;
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import java.util.Arrays;
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import java.util.Collections;
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import java.util.List;
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import java.util.NoSuchElementException;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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@ -336,17 +333,9 @@ public class INodesInPath {
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* otherwise, i < 0, return the (length + i)-th inode.
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*/
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public INode getINode(int i) {
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if (inodes == null || inodes.length == 0) {
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throw new NoSuchElementException("inodes is null or empty");
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}
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int index = i >= 0 ? i : inodes.length + i;
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if (index < inodes.length && index >= 0) {
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return inodes[index];
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} else {
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throw new NoSuchElementException("inodes.length == " + inodes.length);
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}
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return inodes[(i < 0) ? inodes.length + i : i];
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}
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/** @return the last inode. */
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public INode getLastINode() {
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return getINode(-1);
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@ -384,10 +373,6 @@ public class INodesInPath {
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return inodes.length;
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}
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public List<INode> getReadOnlyINodes() {
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return Collections.unmodifiableList(Arrays.asList(inodes));
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}
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public INode[] getINodesArray() {
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INode[] retArr = new INode[inodes.length];
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System.arraycopy(inodes, 0, retArr, 0, inodes.length);
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@ -310,9 +310,8 @@ public class TestSnapshotPathINodes {
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}
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private int getNumNonNull(INodesInPath iip) {
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List<INode> inodes = iip.getReadOnlyINodes();
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for (int i = inodes.size() - 1; i >= 0; i--) {
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if (inodes.get(i) != null) {
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for (int i = iip.length() - 1; i >= 0; i--) {
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if (iip.getINode(i) != null) {
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return i+1;
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}
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}
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