diff options
| author | Brian S. O'Neill <bronee@gmail.com> | 2007-01-29 23:24:57 +0000 |
|---|---|---|
| committer | Brian S. O'Neill <bronee@gmail.com> | 2007-01-29 23:24:57 +0000 |
| commit | 17f39437744585c656cf37d4515a0b115cc73cc8 (patch) | |
| tree | 90f1212ac057cbdb278beea5c273e95cafe85139 /src | |
| parent | 27483a11b591e9aa02a7efdbcc8bb8cabe040b1e (diff) | |
Fixed multiple cursor implementations to be extra paranoid and close the cursor when an exception is thrown.
Diffstat (limited to 'src')
13 files changed, 637 insertions, 307 deletions
diff --git a/src/main/java/com/amazon/carbonado/cursor/AbstractCursor.java b/src/main/java/com/amazon/carbonado/cursor/AbstractCursor.java index fb34617..5fb0fa8 100644 --- a/src/main/java/com/amazon/carbonado/cursor/AbstractCursor.java +++ b/src/main/java/com/amazon/carbonado/cursor/AbstractCursor.java @@ -37,31 +37,67 @@ public abstract class AbstractCursor<S> implements Cursor<S> { }
public int copyInto(Collection<? super S> c) throws FetchException {
- int originalSize = c.size();
- while (hasNext()) {
- c.add(next());
+ try {
+ int originalSize = c.size();
+ while (hasNext()) {
+ c.add(next());
+ }
+ return c.size() - originalSize;
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
- return c.size() - originalSize;
}
public int copyInto(Collection<? super S> c, int limit) throws FetchException {
- int originalSize = c.size();
- while (--limit >= 0 && hasNext()) {
- c.add(next());
+ try {
+ int originalSize = c.size();
+ while (--limit >= 0 && hasNext()) {
+ c.add(next());
+ }
+ return c.size() - originalSize;
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
- return c.size() - originalSize;
}
public List<S> toList() throws FetchException {
- List<S> list = new ArrayList<S>();
- copyInto(list);
- return list;
+ try {
+ List<S> list = new ArrayList<S>();
+ copyInto(list);
+ return list;
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
+ }
}
public List<S> toList(int limit) throws FetchException {
- List<S> list = new ArrayList<S>();
- copyInto(list, limit);
- return list;
+ try {
+ List<S> list = new ArrayList<S>();
+ copyInto(list, limit);
+ return list;
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
+ }
}
public int skipNext(int amount) throws FetchException {
@@ -72,12 +108,21 @@ public abstract class AbstractCursor<S> implements Cursor<S> { return 0;
}
- int count = 0;
- while (--amount >= 0 && hasNext()) {
- next();
- count++;
- }
+ try {
+ int count = 0;
+ while (--amount >= 0 && hasNext()) {
+ next();
+ count++;
+ }
- return count;
+ return count;
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
+ }
}
}
diff --git a/src/main/java/com/amazon/carbonado/cursor/DifferenceCursor.java b/src/main/java/com/amazon/carbonado/cursor/DifferenceCursor.java index 8b330ea..a04aec0 100644 --- a/src/main/java/com/amazon/carbonado/cursor/DifferenceCursor.java +++ b/src/main/java/com/amazon/carbonado/cursor/DifferenceCursor.java @@ -73,47 +73,65 @@ public class DifferenceCursor<S> extends AbstractCursor<S> { S nextLeft;
- while (true) {
- if (mLeftCursor.hasNext()) {
- nextLeft = mLeftCursor.next();
- } else {
- close();
- return false;
- }
- if (mNextRight == null) {
- if (mRightCursor.hasNext()) {
- mNextRight = mRightCursor.next();
+ try {
+ while (true) {
+ if (mLeftCursor.hasNext()) {
+ nextLeft = mLeftCursor.next();
} else {
- mNext = nextLeft;
- return true;
+ close();
+ return false;
}
- }
-
- while (true) {
- int result = mOrder.compare(nextLeft, mNextRight);
- if (result < 0) {
- mNext = nextLeft;
- return true;
- } else if (result > 0) {
+ if (mNextRight == null) {
if (mRightCursor.hasNext()) {
mNextRight = mRightCursor.next();
} else {
- mNextRight = null;
mNext = nextLeft;
return true;
}
- } else {
- break;
+ }
+
+ while (true) {
+ int result = mOrder.compare(nextLeft, mNextRight);
+ if (result < 0) {
+ mNext = nextLeft;
+ return true;
+ } else if (result > 0) {
+ if (mRightCursor.hasNext()) {
+ mNextRight = mRightCursor.next();
+ } else {
+ mNextRight = null;
+ mNext = nextLeft;
+ return true;
+ }
+ } else {
+ break;
+ }
}
}
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
}
public S next() throws FetchException {
- if (hasNext()) {
- S next = mNext;
- mNext = null;
- return next;
+ try {
+ if (hasNext()) {
+ S next = mNext;
+ mNext = null;
+ return next;
+ }
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
throw new NoSuchElementException();
}
diff --git a/src/main/java/com/amazon/carbonado/cursor/FilteredCursor.java b/src/main/java/com/amazon/carbonado/cursor/FilteredCursor.java index f426f36..c25f8db 100644 --- a/src/main/java/com/amazon/carbonado/cursor/FilteredCursor.java +++ b/src/main/java/com/amazon/carbonado/cursor/FilteredCursor.java @@ -101,15 +101,31 @@ public abstract class FilteredCursor<S> extends AbstractCursor<S> { interruptCheck(++count);
}
} catch (NoSuchElementException e) {
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
return false;
}
public S next() throws FetchException {
- if (hasNext()) {
- S next = mNext;
- mNext = null;
- return next;
+ try {
+ if (hasNext()) {
+ S next = mNext;
+ mNext = null;
+ return next;
+ }
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
throw new NoSuchElementException();
}
@@ -122,13 +138,22 @@ public abstract class FilteredCursor<S> extends AbstractCursor<S> { return 0;
}
- int count = 0;
- while (--amount >= 0 && hasNext()) {
- interruptCheck(++count);
- mNext = null;
- }
+ try {
+ int count = 0;
+ while (--amount >= 0 && hasNext()) {
+ interruptCheck(++count);
+ mNext = null;
+ }
- return count;
+ return count;
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
+ }
}
private void interruptCheck(int count) throws FetchException {
diff --git a/src/main/java/com/amazon/carbonado/cursor/GroupedCursor.java b/src/main/java/com/amazon/carbonado/cursor/GroupedCursor.java index 202f73a..daf9419 100644 --- a/src/main/java/com/amazon/carbonado/cursor/GroupedCursor.java +++ b/src/main/java/com/amazon/carbonado/cursor/GroupedCursor.java @@ -157,16 +157,32 @@ public abstract class GroupedCursor<S, G> extends AbstractCursor<G> { }
}
} catch (NoSuchElementException e) {
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
return false;
}
public G next() throws FetchException {
- if (hasNext()) {
- G next = mNextAggregate;
- mNextAggregate = null;
- return next;
+ try {
+ if (hasNext()) {
+ G next = mNextAggregate;
+ mNextAggregate = null;
+ return next;
+ }
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
throw new NoSuchElementException();
}
@@ -179,13 +195,22 @@ public abstract class GroupedCursor<S, G> extends AbstractCursor<G> { return 0;
}
- int count = 0;
- while (--amount >= 0 && hasNext()) {
- interruptCheck(++count);
- mNextAggregate = null;
- }
+ try {
+ int count = 0;
+ while (--amount >= 0 && hasNext()) {
+ interruptCheck(++count);
+ mNextAggregate = null;
+ }
- return count;
+ return count;
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
+ }
}
private void interruptCheck(int count) throws FetchException {
diff --git a/src/main/java/com/amazon/carbonado/cursor/IntersectionCursor.java b/src/main/java/com/amazon/carbonado/cursor/IntersectionCursor.java index 58aba0d..6eb3179 100644 --- a/src/main/java/com/amazon/carbonado/cursor/IntersectionCursor.java +++ b/src/main/java/com/amazon/carbonado/cursor/IntersectionCursor.java @@ -71,47 +71,65 @@ public class IntersectionCursor<S> extends AbstractCursor<S> { S nextLeft, nextRight;
- if (mLeftCursor.hasNext()) {
- nextLeft = mLeftCursor.next();
- } else {
- close();
- return false;
- }
- if (mRightCursor.hasNext()) {
- nextRight = mRightCursor.next();
- } else {
- close();
- return false;
- }
+ try {
+ if (mLeftCursor.hasNext()) {
+ nextLeft = mLeftCursor.next();
+ } else {
+ close();
+ return false;
+ }
+ if (mRightCursor.hasNext()) {
+ nextRight = mRightCursor.next();
+ } else {
+ close();
+ return false;
+ }
- while (true) {
- int result = mOrder.compare(nextLeft, nextRight);
- if (result < 0) {
- if (mLeftCursor.hasNext()) {
- nextLeft = mLeftCursor.next();
+ while (true) {
+ int result = mOrder.compare(nextLeft, nextRight);
+ if (result < 0) {
+ if (mLeftCursor.hasNext()) {
+ nextLeft = mLeftCursor.next();
+ } else {
+ close();
+ return false;
+ }
+ } else if (result > 0) {
+ if (mRightCursor.hasNext()) {
+ nextRight = mRightCursor.next();
+ } else {
+ close();
+ return false;
+ }
} else {
- close();
- return false;
+ mNext = nextLeft;
+ return true;
}
- } else if (result > 0) {
- if (mRightCursor.hasNext()) {
- nextRight = mRightCursor.next();
- } else {
- close();
- return false;
- }
- } else {
- mNext = nextLeft;
- return true;
}
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
}
public S next() throws FetchException {
- if (hasNext()) {
- S next = mNext;
- mNext = null;
- return next;
+ try {
+ if (hasNext()) {
+ S next = mNext;
+ mNext = null;
+ return next;
+ }
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
throw new NoSuchElementException();
}
diff --git a/src/main/java/com/amazon/carbonado/cursor/MultiTransformedCursor.java b/src/main/java/com/amazon/carbonado/cursor/MultiTransformedCursor.java index 7606eab..4b4a25a 100644 --- a/src/main/java/com/amazon/carbonado/cursor/MultiTransformedCursor.java +++ b/src/main/java/com/amazon/carbonado/cursor/MultiTransformedCursor.java @@ -64,34 +64,52 @@ public abstract class MultiTransformedCursor<S, T> extends AbstractCursor<T> { }
public boolean hasNext() throws FetchException {
- if (mNextCursor != null) {
- if (mNextCursor.hasNext()) {
- return true;
- }
- mNextCursor.close();
- mNextCursor = null;
- }
try {
- int count = 0;
- while (mCursor.hasNext()) {
- Cursor<T> nextCursor = transform(mCursor.next());
- if (nextCursor != null) {
- if (nextCursor.hasNext()) {
- mNextCursor = nextCursor;
- return true;
+ if (mNextCursor != null) {
+ if (mNextCursor.hasNext()) {
+ return true;
+ }
+ mNextCursor.close();
+ mNextCursor = null;
+ }
+ try {
+ int count = 0;
+ while (mCursor.hasNext()) {
+ Cursor<T> nextCursor = transform(mCursor.next());
+ if (nextCursor != null) {
+ if (nextCursor.hasNext()) {
+ mNextCursor = nextCursor;
+ return true;
+ }
+ nextCursor.close();
}
- nextCursor.close();
+ interruptCheck(++count);
}
- interruptCheck(++count);
+ } catch (NoSuchElementException e) {
+ }
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
}
- } catch (NoSuchElementException e) {
+ throw e;
}
return false;
}
public T next() throws FetchException {
- if (hasNext()) {
- return mNextCursor.next();
+ try {
+ if (hasNext()) {
+ return mNextCursor.next();
+ }
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
throw new NoSuchElementException();
}
@@ -104,17 +122,26 @@ public abstract class MultiTransformedCursor<S, T> extends AbstractCursor<T> { return 0;
}
- int count = 0;
- while (hasNext()) {
- int chunk = mNextCursor.skipNext(amount);
- count += chunk;
- if ((amount -= chunk) <= 0) {
- break;
+ try {
+ int count = 0;
+ while (hasNext()) {
+ int chunk = mNextCursor.skipNext(amount);
+ count += chunk;
+ if ((amount -= chunk) <= 0) {
+ break;
+ }
+ interruptCheck(count);
}
- interruptCheck(count);
- }
- return count;
+ return count;
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
+ }
}
private void interruptCheck(int count) throws FetchException {
diff --git a/src/main/java/com/amazon/carbonado/cursor/SortedCursor.java b/src/main/java/com/amazon/carbonado/cursor/SortedCursor.java index 9cee89b..15a72d9 100644 --- a/src/main/java/com/amazon/carbonado/cursor/SortedCursor.java +++ b/src/main/java/com/amazon/carbonado/cursor/SortedCursor.java @@ -205,28 +205,46 @@ public class SortedCursor<S> extends AbstractCursor<S> { }
public boolean hasNext() throws FetchException {
- prepareNextChunk();
try {
- if (mChunkIterator.hasNext()) {
- return true;
+ prepareNextChunk();
+ try {
+ if (mChunkIterator.hasNext()) {
+ return true;
+ }
+ } catch (UndeclaredThrowableException e) {
+ throw toFetchException(e);
}
- } catch (UndeclaredThrowableException e) {
- throw toFetchException(e);
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
close();
return false;
}
public S next() throws FetchException {
- prepareNextChunk();
try {
- return mChunkIterator.next();
- } catch (UndeclaredThrowableException e) {
- throw toFetchException(e);
- } catch (NoSuchElementException e) {
+ prepareNextChunk();
+ try {
+ return mChunkIterator.next();
+ } catch (UndeclaredThrowableException e) {
+ throw toFetchException(e);
+ } catch (NoSuchElementException e) {
+ try {
+ close();
+ } catch (FetchException e2) {
+ // Don't care.
+ }
+ throw e;
+ }
+ } catch (FetchException e) {
try {
close();
- } catch (FetchException e2) {
+ } catch (Exception e2) {
// Don't care.
}
throw e;
@@ -241,13 +259,22 @@ public class SortedCursor<S> extends AbstractCursor<S> { return 0;
}
- int count = 0;
- while (--amount >= 0 && hasNext()) {
- next();
- count++;
- }
+ try {
+ int count = 0;
+ while (--amount >= 0 && hasNext()) {
+ next();
+ count++;
+ }
- return count;
+ return count;
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
+ }
}
private void prepareNextChunk() throws FetchException {
diff --git a/src/main/java/com/amazon/carbonado/cursor/SymmetricDifferenceCursor.java b/src/main/java/com/amazon/carbonado/cursor/SymmetricDifferenceCursor.java index 1f94e30..1cd381a 100644 --- a/src/main/java/com/amazon/carbonado/cursor/SymmetricDifferenceCursor.java +++ b/src/main/java/com/amazon/carbonado/cursor/SymmetricDifferenceCursor.java @@ -68,7 +68,16 @@ public class SymmetricDifferenceCursor<S> extends AbstractCursor<S> { }
public boolean hasNext() throws FetchException {
- return compareNext() != 0;
+ try {
+ return compareNext() != 0;
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
+ }
}
/**
@@ -81,43 +90,61 @@ public class SymmetricDifferenceCursor<S> extends AbstractCursor<S> { return mCompareResult;
}
- while (true) {
- if (mNextLeft == null && mLeftCursor.hasNext()) {
- mNextLeft = mLeftCursor.next();
- }
- if (mNextRight == null && mRightCursor.hasNext()) {
- mNextRight = mRightCursor.next();
- }
+ try {
+ while (true) {
+ if (mNextLeft == null && mLeftCursor.hasNext()) {
+ mNextLeft = mLeftCursor.next();
+ }
+ if (mNextRight == null && mRightCursor.hasNext()) {
+ mNextRight = mRightCursor.next();
+ }
- if (mNextLeft == null) {
- return mNextRight != null ? 1 : 0;
+ if (mNextLeft == null) {
+ return mNextRight != null ? 1 : 0;
+ }
+ if (mNextRight == null) {
+ return -1;
+ }
+
+ if ((mCompareResult = mOrder.compare(mNextLeft, mNextRight)) == 0) {
+ mNextLeft = null;
+ mNextRight = null;
+ } else {
+ return mCompareResult;
+ }
}
- if (mNextRight == null) {
- return -1;
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
}
+ throw e;
+ }
+ }
- if ((mCompareResult = mOrder.compare(mNextLeft, mNextRight)) == 0) {
+ public S next() throws FetchException {
+ try {
+ S next;
+ int result = compareNext();
+ if (result < 0) {
+ next = mNextLeft;
mNextLeft = null;
+ } else if (result > 0) {
+ next = mNextRight;
mNextRight = null;
} else {
- return mCompareResult;
+ throw new NoSuchElementException();
}
+ mCompareResult = 0;
+ return next;
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
}
-
- public S next() throws FetchException {
- S next;
- int result = compareNext();
- if (result < 0) {
- next = mNextLeft;
- mNextLeft = null;
- } else if (result > 0) {
- next = mNextRight;
- mNextRight = null;
- } else {
- throw new NoSuchElementException();
- }
- mCompareResult = 0;
- return next;
- }
}
diff --git a/src/main/java/com/amazon/carbonado/cursor/ThrottledCursor.java b/src/main/java/com/amazon/carbonado/cursor/ThrottledCursor.java index 2f4c5a0..d108d95 100644 --- a/src/main/java/com/amazon/carbonado/cursor/ThrottledCursor.java +++ b/src/main/java/com/amazon/carbonado/cursor/ThrottledCursor.java @@ -61,12 +61,30 @@ public class ThrottledCursor<S> extends AbstractCursor<S> { }
public boolean hasNext() throws FetchException {
- return mCursor.hasNext();
+ try {
+ return mCursor.hasNext();
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
+ }
}
public S next() throws FetchException {
- throttle();
- return mCursor.next();
+ try {
+ throttle();
+ return mCursor.next();
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
+ }
}
public int skipNext(int amount) throws FetchException {
@@ -77,16 +95,25 @@ public class ThrottledCursor<S> extends AbstractCursor<S> { return 0;
}
- int count = 0;
- while (--amount >= 0) {
- throttle();
- if (skipNext(1) <= 0) {
- break;
+ try {
+ int count = 0;
+ while (--amount >= 0) {
+ throttle();
+ if (skipNext(1) <= 0) {
+ break;
+ }
+ count++;
}
- count++;
- }
- return count;
+ return count;
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
+ }
}
private void throttle() throws FetchInterruptedException {
diff --git a/src/main/java/com/amazon/carbonado/cursor/TransformedCursor.java b/src/main/java/com/amazon/carbonado/cursor/TransformedCursor.java index 70161cc..46dedd1 100644 --- a/src/main/java/com/amazon/carbonado/cursor/TransformedCursor.java +++ b/src/main/java/com/amazon/carbonado/cursor/TransformedCursor.java @@ -74,15 +74,31 @@ public abstract class TransformedCursor<S, T> extends AbstractCursor<T> { interruptCheck(++count);
}
} catch (NoSuchElementException e) {
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
return false;
}
public T next() throws FetchException {
- if (hasNext()) {
- T next = mNext;
- mNext = null;
- return next;
+ try {
+ if (hasNext()) {
+ T next = mNext;
+ mNext = null;
+ return next;
+ }
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
throw new NoSuchElementException();
}
@@ -95,13 +111,22 @@ public abstract class TransformedCursor<S, T> extends AbstractCursor<T> { return 0;
}
- int count = 0;
- while (--amount >= 0 && hasNext()) {
- interruptCheck(++count);
- mNext = null;
- }
+ try {
+ int count = 0;
+ while (--amount >= 0 && hasNext()) {
+ interruptCheck(++count);
+ mNext = null;
+ }
- return count;
+ return count;
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
+ }
}
private void interruptCheck(int count) throws FetchException {
diff --git a/src/main/java/com/amazon/carbonado/cursor/UnionCursor.java b/src/main/java/com/amazon/carbonado/cursor/UnionCursor.java index 7e4fde3..c2bdd19 100644 --- a/src/main/java/com/amazon/carbonado/cursor/UnionCursor.java +++ b/src/main/java/com/amazon/carbonado/cursor/UnionCursor.java @@ -67,39 +67,57 @@ public class UnionCursor<S> extends AbstractCursor<S> { }
public boolean hasNext() throws FetchException {
- if (mNextLeft == null && mLeftCursor.hasNext()) {
- mNextLeft = mLeftCursor.next();
- }
- if (mNextRight == null && mRightCursor.hasNext()) {
- mNextRight = mRightCursor.next();
+ try {
+ if (mNextLeft == null && mLeftCursor.hasNext()) {
+ mNextLeft = mLeftCursor.next();
+ }
+ if (mNextRight == null && mRightCursor.hasNext()) {
+ mNextRight = mRightCursor.next();
+ }
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
return mNextLeft != null || mNextRight != null;
}
public S next() throws FetchException {
- if (hasNext()) {
- S next;
- if (mNextLeft == null) {
- next = mNextRight;
- mNextRight = null;
- } else if (mNextRight == null) {
- next = mNextLeft;
- mNextLeft = null;
- } else {
- int result = mOrder.compare(mNextLeft, mNextRight);
- if (result < 0) {
- next = mNextLeft;
- mNextLeft = null;
- } else if (result > 0) {
+ try {
+ if (hasNext()) {
+ S next;
+ if (mNextLeft == null) {
next = mNextRight;
mNextRight = null;
- } else {
+ } else if (mNextRight == null) {
next = mNextLeft;
mNextLeft = null;
- mNextRight = null;
+ } else {
+ int result = mOrder.compare(mNextLeft, mNextRight);
+ if (result < 0) {
+ next = mNextLeft;
+ mNextLeft = null;
+ } else if (result > 0) {
+ next = mNextRight;
+ mNextRight = null;
+ } else {
+ next = mNextLeft;
+ mNextLeft = null;
+ mNextRight = null;
+ }
}
+ return next;
+ }
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
}
- return next;
+ throw e;
}
throw new NoSuchElementException();
}
diff --git a/src/main/java/com/amazon/carbonado/repo/indexed/IndexedCursor.java b/src/main/java/com/amazon/carbonado/repo/indexed/IndexedCursor.java index 892af49..35fc492 100644 --- a/src/main/java/com/amazon/carbonado/repo/indexed/IndexedCursor.java +++ b/src/main/java/com/amazon/carbonado/repo/indexed/IndexedCursor.java @@ -63,117 +63,144 @@ class IndexedCursor<S extends Storable> extends AbstractCursor<S> { if (mNext != null) {
return true;
}
- while (mCursor.hasNext()) {
- final Storable indexEntry = mCursor.next();
-
- S master = mStorage.mMasterStorage.prepare();
- mGenerator.copyToMasterPrimaryKey(indexEntry, master);
-
- if (!master.tryLoad()) {
- LogFactory.getLog(getClass()).warn
- ("Master is missing for index entry: " + indexEntry);
- } else {
- if (mGenerator.isConsistent(indexEntry, master)) {
- mNext = master;
- return true;
- }
-
- // This index entry is stale. Repair is needed.
-
- // Insert a correct index entry, just to be sure.
- try {
- final IndexedRepository repo = mStorage.mRepository;
- final Storage<?> indexEntryStorage =
- repo.getIndexEntryStorageFor(mGenerator.getIndexEntryClass());
- Storable newIndexEntry = indexEntryStorage.prepare();
- mGenerator.copyFromMaster(newIndexEntry, master);
-
- if (newIndexEntry.tryLoad()) {
- // Good, the correct index entry exists. We'll see
- // the master record eventually, so skip.
- } else {
- // We have no choice but to return the master, at
- // the risk of seeing it multiple times. This is
- // better than seeing it never.
- LogFactory.getLog(getClass()).warn
- ("Inconsistent index entry: " + indexEntry);
+ try {
+ while (mCursor.hasNext()) {
+ final Storable indexEntry = mCursor.next();
+
+ S master = mStorage.mMasterStorage.prepare();
+ mGenerator.copyToMasterPrimaryKey(indexEntry, master);
+
+ if (!master.tryLoad()) {
+ LogFactory.getLog(getClass()).warn
+ ("Master is missing for index entry: " + indexEntry);
+ } else {
+ if (mGenerator.isConsistent(indexEntry, master)) {
mNext = master;
+ return true;
}
- // Repair the stale index entry.
- RepairExecutor.execute(new Runnable() {
- public void run() {
- Transaction txn = repo.enterTransaction();
- try {
- // Reload master and verify inconsistency.
- S master = mStorage.mMasterStorage.prepare();
- mGenerator.copyToMasterPrimaryKey(indexEntry, master);
-
- if (master.tryLoad()) {
- Storable newIndexEntry = indexEntryStorage.prepare();
- mGenerator.copyFromMaster(newIndexEntry, master);
-
- newIndexEntry.tryInsert();
+ // This index entry is stale. Repair is needed.
+
+ // Insert a correct index entry, just to be sure.
+ try {
+ final IndexedRepository repo = mStorage.mRepository;
+ final Storage<?> indexEntryStorage =
+ repo.getIndexEntryStorageFor(mGenerator.getIndexEntryClass());
+ Storable newIndexEntry = indexEntryStorage.prepare();
+ mGenerator.copyFromMaster(newIndexEntry, master);
+
+ if (newIndexEntry.tryLoad()) {
+ // Good, the correct index entry exists. We'll see
+ // the master record eventually, so skip.
+ } else {
+ // We have no choice but to return the master, at
+ // the risk of seeing it multiple times. This is
+ // better than seeing it never.
+ LogFactory.getLog(getClass()).warn
+ ("Inconsistent index entry: " + indexEntry);
+ mNext = master;
+ }
- indexEntry.tryDelete();
- txn.commit();
- }
- } catch (FetchException fe) {
- LogFactory.getLog(IndexedCursor.class).warn
- ("Unable to check if repair required for " +
- "inconsistent index entry " +
- indexEntry, fe);
- } catch (PersistException pe) {
- LogFactory.getLog(IndexedCursor.class).error
- ("Unable to repair inconsistent index entry " +
- indexEntry, pe);
- } finally {
+ // Repair the stale index entry.
+ RepairExecutor.execute(new Runnable() {
+ public void run() {
+ Transaction txn = repo.enterTransaction();
try {
- txn.exit();
+ // Reload master and verify inconsistency.
+ S master = mStorage.mMasterStorage.prepare();
+ mGenerator.copyToMasterPrimaryKey(indexEntry, master);
+
+ if (master.tryLoad()) {
+ Storable newIndexEntry = indexEntryStorage.prepare();
+ mGenerator.copyFromMaster(newIndexEntry, master);
+
+ newIndexEntry.tryInsert();
+
+ indexEntry.tryDelete();
+ txn.commit();
+ }
+ } catch (FetchException fe) {
+ LogFactory.getLog(IndexedCursor.class).warn
+ ("Unable to check if repair required for " +
+ "inconsistent index entry " +
+ indexEntry, fe);
} catch (PersistException pe) {
LogFactory.getLog(IndexedCursor.class).error
("Unable to repair inconsistent index entry " +
indexEntry, pe);
+ } finally {
+ try {
+ txn.exit();
+ } catch (PersistException pe) {
+ LogFactory.getLog(IndexedCursor.class).error
+ ("Unable to repair inconsistent index entry " +
+ indexEntry, pe);
+ }
}
}
- }
- });
- } catch (RepositoryException re) {
- LogFactory.getLog(getClass()).error
- ("Unable to inspect inconsistent index entry " +
- indexEntry, re);
- }
+ });
+ } catch (RepositoryException re) {
+ LogFactory.getLog(getClass()).error
+ ("Unable to inspect inconsistent index entry " +
+ indexEntry, re);
+ }
- if (mNext != null) {
- return true;
+ if (mNext != null) {
+ return true;
+ }
}
}
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
return false;
}
public S next() throws FetchException {
- if (hasNext()) {
- S next = mNext;
- mNext = null;
- return next;
+ try {
+ if (hasNext()) {
+ S next = mNext;
+ mNext = null;
+ return next;
+ }
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
}
throw new NoSuchElementException();
}
public int skipNext(int amount) throws FetchException {
- if (mNext == null) {
- return mCursor.skipNext(amount);
- }
+ try {
+ if (mNext == null) {
+ return mCursor.skipNext(amount);
+ }
- if (amount <= 0) {
- if (amount < 0) {
- throw new IllegalArgumentException("Cannot skip negative amount: " + amount);
+ if (amount <= 0) {
+ if (amount < 0) {
+ throw new IllegalArgumentException("Cannot skip negative amount: " + amount);
+ }
+ return 0;
}
- return 0;
- }
- mNext = null;
- return 1 + mCursor.skipNext(amount - 1);
+ mNext = null;
+ return 1 + mCursor.skipNext(amount - 1);
+ } catch (FetchException e) {
+ try {
+ close();
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
+ }
}
}
diff --git a/src/main/java/com/amazon/carbonado/repo/jdbc/JDBCCursor.java b/src/main/java/com/amazon/carbonado/repo/jdbc/JDBCCursor.java index f419c0d..fa80fde 100644 --- a/src/main/java/com/amazon/carbonado/repo/jdbc/JDBCCursor.java +++ b/src/main/java/com/amazon/carbonado/repo/jdbc/JDBCCursor.java @@ -35,10 +35,10 @@ import com.amazon.carbonado.cursor.AbstractCursor; */
class JDBCCursor<S extends Storable> extends AbstractCursor<S> {
private final JDBCStorage<S> mStorage;
- private Connection mConnection;
- private PreparedStatement mStatement;
- private ResultSet mResultSet;
+ private final Connection mConnection;
+ private final PreparedStatement mStatement;
+ private ResultSet mResultSet;
private boolean mHasNext;
JDBCCursor(JDBCStorage<S> storage,
@@ -49,7 +49,17 @@ class JDBCCursor<S extends Storable> extends AbstractCursor<S> { mStorage = storage;
mConnection = con;
mStatement = statement;
- mResultSet = statement.executeQuery();
+ try {
+ mResultSet = statement.executeQuery();
+ } catch (SQLException e) {
+ try {
+ statement.close();
+ storage.mRepository.yieldConnection(con);
+ } catch (Exception e2) {
+ // Don't care.
+ }
+ throw e;
+ }
}
public void close() throws FetchException {
@@ -62,6 +72,7 @@ class JDBCCursor<S extends Storable> extends AbstractCursor<S> { throw mStorage.getJDBCRepository().toFetchException(e);
} finally {
mResultSet = null;
+ mHasNext = false;
}
}
}
@@ -75,6 +86,11 @@ class JDBCCursor<S extends Storable> extends AbstractCursor<S> { try {
mHasNext = rs.next();
} catch (SQLException e) {
+ try {
+ close();
+ } catch (FetchException e2) {
+ // Don't care.
+ }
throw mStorage.getJDBCRepository().toFetchException(e);
}
if (!mHasNext) {
@@ -93,6 +109,11 @@ class JDBCCursor<S extends Storable> extends AbstractCursor<S> { mHasNext = false;
return obj;
} catch (SQLException e) {
+ try {
+ close();
+ } catch (FetchException e2) {
+ // Don't care.
+ }
throw mStorage.getJDBCRepository().toFetchException(e);
}
}
|